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-rw-r--r--t/perf/.gitignore4
-rw-r--r--t/perf/Makefile21
-rw-r--r--t/perf/README210
-rwxr-xr-xt/perf/aggregate.perl357
-rwxr-xr-xt/perf/bisect_regression73
-rwxr-xr-xt/perf/bisect_run_script53
-rw-r--r--t/perf/config2
-rw-r--r--t/perf/lib-bitmap.sh100
-rw-r--r--t/perf/lib-pack.sh25
-rwxr-xr-xt/perf/min_time.perl21
-rwxr-xr-xt/perf/p0000-perf-lib-sanity.sh57
-rwxr-xr-xt/perf/p0001-rev-list.sh48
-rwxr-xr-xt/perf/p0002-read-cache.sh14
-rwxr-xr-xt/perf/p0003-delta-base-cache.sh31
-rwxr-xr-xt/perf/p0004-lazy-init-name-hash.sh56
-rwxr-xr-xt/perf/p0005-status.sh49
-rwxr-xr-xt/perf/p0006-read-tree-checkout.sh75
-rwxr-xr-xt/perf/p0007-write-cache.sh29
-rwxr-xr-xt/perf/p0008-odb-fsync.sh82
-rwxr-xr-xt/perf/p0071-sort.sh52
-rwxr-xr-xt/perf/p0090-cache-tree.sh36
-rwxr-xr-xt/perf/p0100-globbing.sh43
-rwxr-xr-xt/perf/p1006-cat-file.sh12
-rwxr-xr-xt/perf/p1400-update-ref.sh33
-rwxr-xr-xt/perf/p1450-fsck.sh13
-rwxr-xr-xt/perf/p1451-fsck-skip-list.sh40
-rwxr-xr-xt/perf/p1500-graph-walks.sh50
-rwxr-xr-xt/perf/p2000-sparse-operations.sh139
-rwxr-xr-xt/perf/p3400-rebase.sh56
-rwxr-xr-xt/perf/p3404-rebase-interactive.sh36
-rwxr-xr-xt/perf/p4000-diff-algorithms.sh29
-rwxr-xr-xt/perf/p4001-diff-no-index.sh22
-rwxr-xr-xt/perf/p4002-diff-color-moved.sh57
-rwxr-xr-xt/perf/p4205-log-pretty-formats.sh16
-rwxr-xr-xt/perf/p4209-pickaxe.sh70
-rwxr-xr-xt/perf/p4211-line-log.sh42
-rwxr-xr-xt/perf/p4220-log-grep-engines.sh54
-rwxr-xr-xt/perf/p4221-log-grep-engines-fixed.sh45
-rwxr-xr-xt/perf/p5302-pack-index.sh50
-rwxr-xr-xt/perf/p5303-many-packs.sh144
-rwxr-xr-xt/perf/p5304-prune.sh35
-rwxr-xr-xt/perf/p5310-pack-bitmaps.sh40
-rwxr-xr-xt/perf/p5311-pack-bitmaps-fetch.sh54
-rwxr-xr-xt/perf/p5312-pack-bitmaps-revs.sh34
-rwxr-xr-xt/perf/p5326-multi-pack-bitmaps.sh67
-rwxr-xr-xt/perf/p5550-fetch-tags.sh78
-rwxr-xr-xt/perf/p5551-fetch-rescan.sh55
-rwxr-xr-xt/perf/p5600-partial-clone.sh42
-rwxr-xr-xt/perf/p5601-clone-reference.sh27
-rwxr-xr-xt/perf/p7000-filter-branch.sh24
-rwxr-xr-xt/perf/p7102-reset.sh21
-rwxr-xr-xt/perf/p7300-clean.sh35
-rwxr-xr-xt/perf/p7519-fsmonitor.sh314
-rwxr-xr-xt/perf/p7527-builtin-fsmonitor.sh257
-rwxr-xr-xt/perf/p7810-grep.sh23
-rwxr-xr-xt/perf/p7820-grep-engines.sh90
-rwxr-xr-xt/perf/p7821-grep-engines-fixed.sh74
-rwxr-xr-xt/perf/p7822-grep-perl-character.sh42
-rwxr-xr-xt/perf/p9210-scalar.sh39
-rwxr-xr-xt/perf/p9300-fast-import-export.sh23
-rw-r--r--t/perf/perf-lib.sh334
-rw-r--r--t/perf/repos/.gitignore1
-rwxr-xr-xt/perf/repos/inflate-repo.sh85
-rwxr-xr-xt/perf/repos/many-files.sh110
-rwxr-xr-xt/perf/run257
65 files changed, 4507 insertions, 0 deletions
diff --git a/t/perf/.gitignore b/t/perf/.gitignore
new file mode 100644
index 0000000..72f5d0d
--- /dev/null
+++ b/t/perf/.gitignore
@@ -0,0 +1,4 @@
+/build/
+/test-results/
+/test-trace/
+/trash directory*/
diff --git a/t/perf/Makefile b/t/perf/Makefile
new file mode 100644
index 0000000..e4808ae
--- /dev/null
+++ b/t/perf/Makefile
@@ -0,0 +1,21 @@
+# Import tree-wide shared Makefile behavior and libraries
+include ../../shared.mak
+
+-include ../../config.mak
+export GIT_TEST_OPTIONS
+
+all: test-lint perf
+
+perf: pre-clean
+ ./run
+
+pre-clean:
+ rm -rf test-results test-trace
+
+clean:
+ rm -rf build "trash directory".* test-results test-trace
+
+test-lint:
+ $(MAKE) -C .. test-lint
+
+.PHONY: all perf pre-clean clean
diff --git a/t/perf/README b/t/perf/README
new file mode 100644
index 0000000..8f217d7
--- /dev/null
+++ b/t/perf/README
@@ -0,0 +1,210 @@
+Git performance tests
+=====================
+
+This directory holds performance testing scripts for git tools. The
+first part of this document describes the various ways in which you
+can run them.
+
+When fixing the tools or adding enhancements, you are strongly
+encouraged to add tests in this directory to cover what you are
+trying to fix or enhance. The later part of this short document
+describes how your test scripts should be organized.
+
+
+Running Tests
+-------------
+
+The easiest way to run tests is to say "make". This runs all
+the tests on the current git repository.
+
+ === Running 2 tests in this tree ===
+ [...]
+ Test this tree
+ ---------------------------------------------------------
+ 0001.1: rev-list --all 0.54(0.51+0.02)
+ 0001.2: rev-list --all --objects 6.14(5.99+0.11)
+ 7810.1: grep worktree, cheap regex 0.16(0.16+0.35)
+ 7810.2: grep worktree, expensive regex 7.90(29.75+0.37)
+ 7810.3: grep --cached, cheap regex 3.07(3.02+0.25)
+ 7810.4: grep --cached, expensive regex 9.39(30.57+0.24)
+
+Output format is in seconds "Elapsed(User + System)"
+
+You can compare multiple repositories and even git revisions with the
+'run' script:
+
+ $ ./run . origin/next /path/to/git-tree p0001-rev-list.sh
+
+where . stands for the current git tree. The full invocation is
+
+ ./run [<revision|directory>...] [--] [<test-script>...]
+
+A '.' argument is implied if you do not pass any other
+revisions/directories.
+
+You can also manually test this or another git build tree, and then
+call the aggregation script to summarize the results:
+
+ $ ./p0001-rev-list.sh
+ [...]
+ $ ./run /path/to/other/git -- ./p0001-rev-list.sh
+ [...]
+ $ ./aggregate.perl . /path/to/other/git ./p0001-rev-list.sh
+
+aggregate.perl has the same invocation as 'run', it just does not run
+anything beforehand.
+
+You can set the following variables (also in your config.mak):
+
+ GIT_PERF_REPEAT_COUNT
+ Number of times a test should be repeated for best-of-N
+ measurements. Defaults to 3.
+
+ GIT_PERF_MAKE_OPTS
+ Options to use when automatically building a git tree for
+ performance testing. E.g., -j6 would be useful. Passed
+ directly to make as "make $GIT_PERF_MAKE_OPTS".
+
+ GIT_PERF_MAKE_COMMAND
+ An arbitrary command that'll be run in place of the make
+ command, if set the GIT_PERF_MAKE_OPTS variable is
+ ignored. Useful in cases where source tree changes might
+ require issuing a different make command to different
+ revisions.
+
+ This can be (ab)used to monkeypatch or otherwise change the
+ tree about to be built. Note that the build directory can be
+ re-used for subsequent runs so the make command might get
+ executed multiple times on the same tree, but don't count on
+ any of that, that's an implementation detail that might change
+ in the future.
+
+ GIT_PERF_REPO
+ GIT_PERF_LARGE_REPO
+ Repositories to copy for the performance tests. The normal
+ repo should be at least git.git size. The large repo should
+ probably be about linux.git size for optimal results.
+ Both default to the git.git you are running from.
+
+ GIT_PERF_EXTRA
+ Boolean to enable additional tests. Most test scripts are
+ written to detect regressions between two versions of Git, and
+ the output will compare timings for individual tests between
+ those versions. Some scripts have additional tests which are not
+ run by default, that show patterns within a single version of
+ Git (e.g., performance of index-pack as the number of threads
+ changes). These can be enabled with GIT_PERF_EXTRA.
+
+ GIT_PERF_USE_SCALAR
+ Boolean indicating whether to register test repo(s) with Scalar
+ before executing tests.
+
+You can also pass the options taken by ordinary git tests; the most
+useful one is:
+
+--root=<directory>::
+ Create "trash" directories used to store all temporary data during
+ testing under <directory>, instead of the t/ directory.
+ Using this option with a RAM-based filesystem (such as tmpfs)
+ can massively speed up the test suite.
+
+
+Naming Tests
+------------
+
+The performance test files are named as:
+
+ pNNNN-commandname-details.sh
+
+where N is a decimal digit. The same conventions for choosing NNNN as
+for normal tests apply.
+
+
+Writing Tests
+-------------
+
+The perf script starts much like a normal test script, except it
+sources perf-lib.sh:
+
+ #!/bin/sh
+ #
+ # Copyright (c) 2005 Junio C Hamano
+ #
+
+ test_description='xxx performance test'
+ . ./perf-lib.sh
+
+After that you will want to use some of the following:
+
+ test_perf_fresh_repo # sets up an empty repository
+ test_perf_default_repo # sets up a "normal" repository
+ test_perf_large_repo # sets up a "large" repository
+
+ test_perf_default_repo sub # ditto, in a subdir "sub"
+
+ test_checkout_worktree # if you need the worktree too
+
+At least one of the first two is required!
+
+You can use test_expect_success as usual. In both test_expect_success
+and in test_perf, running "git" points to the version that is being
+perf-tested. The $MODERN_GIT variable points to the git wrapper for the
+currently checked-out version (i.e., the one that matches the t/perf
+scripts you are running). This is useful if your setup uses commands
+that only work with newer versions of git than what you might want to
+test (but obviously your new commands must still create a state that can
+be used by the older version of git you are testing).
+
+For actual performance tests, use
+
+ test_perf 'descriptive string' '
+ command1 &&
+ command2
+ '
+
+test_perf spawns a subshell, for lack of better options. This means
+that
+
+* you _must_ export all variables that you need in the subshell
+
+* you _must_ flag all variables that you want to persist from the
+ subshell with 'test_export':
+
+ test_perf 'descriptive string' '
+ foo=$(git rev-parse HEAD) &&
+ test_export foo
+ '
+
+ The so-exported variables are automatically marked for export in the
+ shell executing the perf test. For your convenience, test_export is
+ the same as export in the main shell.
+
+ This feature relies on a bit of magic using 'set' and 'source'.
+ While we have tried to make sure that it can cope with embedded
+ whitespace and other special characters, it will not work with
+ multi-line data.
+
+Rather than tracking the performance by run-time as `test_perf` does, you
+may also track output size by using `test_size`. The stdout of the
+function should be a single numeric value, which will be captured and
+shown in the aggregated output. For example:
+
+ test_perf 'time foo' '
+ ./foo >foo.out
+ '
+
+ test_size 'output size'
+ wc -c <foo.out
+ '
+
+might produce output like:
+
+ Test origin HEAD
+ -------------------------------------------------------------
+ 1234.1 time foo 0.37(0.79+0.02) 0.26(0.51+0.02) -29.7%
+ 1234.2 output size 4.3M 3.6M -14.7%
+
+The item being measured (and its units) is up to the test; the context
+and the test title should make it clear to the user whether bigger or
+smaller numbers are better. Unlike test_perf, the test code will only be
+run once, since output sizes tend to be more deterministic than timings.
diff --git a/t/perf/aggregate.perl b/t/perf/aggregate.perl
new file mode 100755
index 0000000..575d200
--- /dev/null
+++ b/t/perf/aggregate.perl
@@ -0,0 +1,357 @@
+#!/usr/bin/perl
+
+use lib '../../perl/build/lib';
+use strict;
+use warnings;
+use Getopt::Long;
+use Cwd qw(realpath);
+
+sub get_times {
+ my $name = shift;
+ open my $fh, "<", $name or return undef;
+ my $line = <$fh>;
+ return undef if not defined $line;
+ close $fh or die "cannot close $name: $!";
+ # times
+ if ($line =~ /^(?:(\d+):)?(\d+):(\d+(?:\.\d+)?) (\d+(?:\.\d+)?) (\d+(?:\.\d+)?)$/) {
+ my $rt = ((defined $1 ? $1 : 0.0)*60+$2)*60+$3;
+ return ($rt, $4, $5);
+ # size
+ } elsif ($line =~ /^\s*(\d+)$/) {
+ return $1;
+ } else {
+ die "bad input line: $line";
+ }
+}
+
+sub relative_change {
+ my ($r, $firstr) = @_;
+ if ($firstr > 0) {
+ return sprintf "%+.1f%%", 100.0*($r-$firstr)/$firstr;
+ } elsif ($r == 0) {
+ return "=";
+ } else {
+ return "+inf";
+ }
+}
+
+sub format_times {
+ my ($r, $u, $s, $firstr) = @_;
+ # no value means we did not finish the test
+ if (!defined $r) {
+ return "<missing>";
+ }
+ # a single value means we have a size, not times
+ if (!defined $u) {
+ return format_size($r, $firstr);
+ }
+ # otherwise, we have real/user/system times
+ my $out = sprintf "%.2f(%.2f+%.2f)", $r, $u, $s;
+ $out .= ' ' . relative_change($r, $firstr) if defined $firstr;
+ return $out;
+}
+
+sub usage {
+ print <<EOT;
+./aggregate.perl [options] [--] [<dir_or_rev>...] [--] [<test_script>...] >
+
+ Options:
+ --codespeed * Format output for Codespeed
+ --reponame <str> * Send given reponame to codespeed
+ --results-dir <str> * Directory where test results are located
+ --sort-by <str> * Sort output (only "regression" criteria is supported)
+ --subsection <str> * Use results from given subsection
+
+EOT
+ exit(1);
+}
+
+sub human_size {
+ my $n = shift;
+ my @units = ('', qw(K M G));
+ while ($n > 900 && @units > 1) {
+ $n /= 1000;
+ shift @units;
+ }
+ return $n unless length $units[0];
+ return sprintf '%.1f%s', $n, $units[0];
+}
+
+sub format_size {
+ my ($size, $first) = @_;
+ # match the width of a time: 0.00(0.00+0.00)
+ my $out = sprintf '%15s', human_size($size);
+ $out .= ' ' . relative_change($size, $first) if defined $first;
+ return $out;
+}
+
+sub sane_backticks {
+ open(my $fh, '-|', @_);
+ return <$fh>;
+}
+
+my (@dirs, %dirnames, %dirabbrevs, %prefixes, @tests,
+ $codespeed, $sortby, $subsection, $reponame);
+my $resultsdir = "test-results";
+
+Getopt::Long::Configure qw/ require_order /;
+
+my $rc = GetOptions("codespeed" => \$codespeed,
+ "reponame=s" => \$reponame,
+ "results-dir=s" => \$resultsdir,
+ "sort-by=s" => \$sortby,
+ "subsection=s" => \$subsection);
+usage() unless $rc;
+
+while (scalar @ARGV) {
+ my $arg = $ARGV[0];
+ my $dir;
+ my $prefix = '';
+ last if -f $arg or $arg eq "--";
+ if (! -d $arg) {
+ my $rev = sane_backticks(qw(git rev-parse --verify), $arg);
+ chomp $rev;
+ $dir = "build/".$rev;
+ } elsif ($arg eq '.') {
+ $dir = '.';
+ } else {
+ $dir = realpath($arg);
+ $dirnames{$dir} = $dir;
+ $prefix .= 'bindir';
+ }
+ push @dirs, $dir;
+ $dirnames{$dir} ||= $arg;
+ $prefix .= $dir;
+ $prefix =~ tr/^a-zA-Z0-9/_/c;
+ $prefixes{$dir} = $prefix . '.';
+ shift @ARGV;
+}
+
+if (not @dirs) {
+ @dirs = ('.');
+}
+$dirnames{'.'} = $dirabbrevs{'.'} = "this tree";
+$prefixes{'.'} = '';
+
+shift @ARGV if scalar @ARGV and $ARGV[0] eq "--";
+
+@tests = @ARGV;
+if (not @tests) {
+ @tests = glob "p????-*.sh";
+}
+
+if (! $subsection and
+ exists $ENV{GIT_PERF_SUBSECTION} and
+ $ENV{GIT_PERF_SUBSECTION} ne "") {
+ $subsection = $ENV{GIT_PERF_SUBSECTION};
+}
+
+if ($subsection) {
+ $resultsdir .= "/" . $subsection;
+}
+
+my @subtests;
+my %shorttests;
+for my $t (@tests) {
+ $t =~ s{(?:.*/)?(p(\d+)-[^/]+)\.sh$}{$1} or die "bad test name: $t";
+ my $n = $2;
+ my $fname = "$resultsdir/$t.subtests";
+ open my $fp, "<", $fname or die "cannot open $fname: $!";
+ for (<$fp>) {
+ chomp;
+ /^(\d+)$/ or die "malformed subtest line: $_";
+ push @subtests, "$t.$1";
+ $shorttests{"$t.$1"} = "$n.$1";
+ }
+ close $fp or die "cannot close $fname: $!";
+}
+
+sub read_descr {
+ my $name = shift;
+ open my $fh, "<", $name or return "<error reading description>";
+ binmode $fh, ":utf8" or die "PANIC on binmode: $!";
+ my $line = <$fh>;
+ close $fh or die "cannot close $name";
+ chomp $line;
+ return $line;
+}
+
+sub have_duplicate {
+ my %seen;
+ for (@_) {
+ return 1 if exists $seen{$_};
+ $seen{$_} = 1;
+ }
+ return 0;
+}
+sub have_slash {
+ for (@_) {
+ return 1 if m{/};
+ }
+ return 0;
+}
+
+sub display_dir {
+ my ($d) = @_;
+ return exists $dirabbrevs{$d} ? $dirabbrevs{$d} : $dirnames{$d};
+}
+
+sub print_default_results {
+ my %descrs;
+ my $descrlen = 4; # "Test"
+ for my $t (@subtests) {
+ $descrs{$t} = $shorttests{$t}.": ".read_descr("$resultsdir/$t.descr");
+ $descrlen = length $descrs{$t} if length $descrs{$t}>$descrlen;
+ }
+
+ my %newdirabbrevs = %dirabbrevs;
+ while (!have_duplicate(values %newdirabbrevs)) {
+ %dirabbrevs = %newdirabbrevs;
+ last if !have_slash(values %dirabbrevs);
+ %newdirabbrevs = %dirabbrevs;
+ for (values %newdirabbrevs) {
+ s{^[^/]*/}{};
+ }
+ }
+
+ my %times;
+ my @colwidth = ((0)x@dirs);
+ for my $i (0..$#dirs) {
+ my $w = length display_dir($dirs[$i]);
+ $colwidth[$i] = $w if $w > $colwidth[$i];
+ }
+ for my $t (@subtests) {
+ my $firstr;
+ for my $i (0..$#dirs) {
+ my $d = $dirs[$i];
+ my $base = "$resultsdir/$prefixes{$d}$t";
+ $times{$prefixes{$d}.$t} = [get_times("$base.result")];
+ my ($r,$u,$s) = @{$times{$prefixes{$d}.$t}};
+ my $w = length format_times($r,$u,$s,$firstr);
+ $colwidth[$i] = $w if $w > $colwidth[$i];
+ $firstr = $r unless defined $firstr;
+ }
+ }
+ my $totalwidth = 3*@dirs+$descrlen;
+ $totalwidth += $_ for (@colwidth);
+
+ printf "%-${descrlen}s", "Test";
+ for my $i (0..$#dirs) {
+ printf " %-$colwidth[$i]s", display_dir($dirs[$i]);
+ }
+ print "\n";
+ print "-"x$totalwidth, "\n";
+ for my $t (@subtests) {
+ printf "%-${descrlen}s", $descrs{$t};
+ my $firstr;
+ for my $i (0..$#dirs) {
+ my $d = $dirs[$i];
+ my ($r,$u,$s) = @{$times{$prefixes{$d}.$t}};
+ printf " %-$colwidth[$i]s", format_times($r,$u,$s,$firstr);
+ $firstr = $r unless defined $firstr;
+ }
+ print "\n";
+ }
+}
+
+sub print_sorted_results {
+ my ($sortby) = @_;
+
+ if ($sortby ne "regression") {
+ print "Only 'regression' is supported as '--sort-by' argument\n";
+ usage();
+ }
+
+ my @evolutions;
+ for my $t (@subtests) {
+ my ($prevr, $prevu, $prevs, $prevrev);
+ for my $i (0..$#dirs) {
+ my $d = $dirs[$i];
+ my ($r, $u, $s) = get_times("$resultsdir/$prefixes{$d}$t.result");
+ if ($i > 0 and defined $r and defined $prevr and $prevr > 0) {
+ my $percent = 100.0 * ($r - $prevr) / $prevr;
+ push @evolutions, { "percent" => $percent,
+ "test" => $t,
+ "prevrev" => $prevrev,
+ "rev" => $d,
+ "prevr" => $prevr,
+ "r" => $r,
+ "prevu" => $prevu,
+ "u" => $u,
+ "prevs" => $prevs,
+ "s" => $s};
+ }
+ ($prevr, $prevu, $prevs, $prevrev) = ($r, $u, $s, $d);
+ }
+ }
+
+ my @sorted_evolutions = sort { $b->{percent} <=> $a->{percent} } @evolutions;
+
+ for my $e (@sorted_evolutions) {
+ printf "%+.1f%%", $e->{percent};
+ print " " . $e->{test};
+ print " " . format_times($e->{prevr}, $e->{prevu}, $e->{prevs});
+ print " " . format_times($e->{r}, $e->{u}, $e->{s});
+ print " " . display_dir($e->{prevrev});
+ print " " . display_dir($e->{rev});
+ print "\n";
+ }
+}
+
+sub print_codespeed_results {
+ my ($subsection) = @_;
+
+ my $project = "Git";
+
+ my $executable = `uname -s -m`;
+ chomp $executable;
+
+ if ($subsection) {
+ $executable .= ", " . $subsection;
+ }
+
+ my $environment;
+ if ($reponame) {
+ $environment = $reponame;
+ } elsif (exists $ENV{GIT_PERF_REPO_NAME} and $ENV{GIT_PERF_REPO_NAME} ne "") {
+ $environment = $ENV{GIT_PERF_REPO_NAME};
+ } else {
+ $environment = `uname -r`;
+ chomp $environment;
+ }
+
+ my @data;
+
+ for my $t (@subtests) {
+ for my $d (@dirs) {
+ my $commitid = $prefixes{$d};
+ $commitid =~ s/^build_//;
+ $commitid =~ s/\.$//;
+ my ($result_value, $u, $s) = get_times("$resultsdir/$prefixes{$d}$t.result");
+
+ my %vals = (
+ "commitid" => $commitid,
+ "project" => $project,
+ "branch" => $dirnames{$d},
+ "executable" => $executable,
+ "benchmark" => $shorttests{$t} . " " . read_descr("$resultsdir/$t.descr"),
+ "environment" => $environment,
+ "result_value" => $result_value,
+ );
+ push @data, \%vals;
+ }
+ }
+
+ require JSON;
+ print JSON::to_json(\@data, {utf8 => 1, pretty => 1, canonical => 1}), "\n";
+}
+
+binmode STDOUT, ":utf8" or die "PANIC on binmode: $!";
+
+if ($codespeed) {
+ print_codespeed_results($subsection);
+} elsif (defined $sortby) {
+ print_sorted_results($sortby);
+} else {
+ print_default_results();
+}
diff --git a/t/perf/bisect_regression b/t/perf/bisect_regression
new file mode 100755
index 0000000..ce47e16
--- /dev/null
+++ b/t/perf/bisect_regression
@@ -0,0 +1,73 @@
+#!/bin/sh
+
+# Read a line coming from `./aggregate.perl --sort-by regression ...`
+# and automatically bisect to find the commit responsible for the
+# performance regression.
+#
+# Lines from `./aggregate.perl --sort-by regression ...` look like:
+#
+# +100.0% p7821-grep-engines-fixed.1 0.04(0.10+0.03) 0.08(0.11+0.08) v2.14.3 v2.15.1
+# +33.3% p7820-grep-engines.1 0.03(0.08+0.02) 0.04(0.08+0.02) v2.14.3 v2.15.1
+#
+
+die () {
+ echo >&2 "error: $*"
+ exit 1
+}
+
+while [ $# -gt 0 ]; do
+ arg="$1"
+ case "$arg" in
+ --help)
+ echo "usage: $0 [--config file] [--subsection subsection]"
+ exit 0
+ ;;
+ --config)
+ shift
+ GIT_PERF_CONFIG_FILE=$(cd "$(dirname "$1")"; pwd)/$(basename "$1")
+ export GIT_PERF_CONFIG_FILE
+ shift ;;
+ --subsection)
+ shift
+ GIT_PERF_SUBSECTION="$1"
+ export GIT_PERF_SUBSECTION
+ shift ;;
+ --*)
+ die "unrecognised option: '$arg'" ;;
+ *)
+ die "unknown argument '$arg'"
+ ;;
+ esac
+done
+
+read -r regression subtest oldtime newtime oldrev newrev
+
+test_script=$(echo "$subtest" | sed -e 's/\(.*\)\.[0-9]*$/\1.sh/')
+test_number=$(echo "$subtest" | sed -e 's/.*\.\([0-9]*\)$/\1/')
+
+# oldtime and newtime are decimal number, not integers
+
+oldtime=$(echo "$oldtime" | sed -e 's/^\([0-9]\+\.[0-9]\+\).*$/\1/')
+newtime=$(echo "$newtime" | sed -e 's/^\([0-9]\+\.[0-9]\+\).*$/\1/')
+
+test $(echo "$newtime" "$oldtime" | awk '{ print ($1 > $2) }') = 1 ||
+ die "New time '$newtime' should be greater than old time '$oldtime'"
+
+tmpdir=$(mktemp -d -t bisect_regression_XXXXXX) || die "Failed to create temp directory"
+echo "$oldtime" >"$tmpdir/oldtime" || die "Failed to write to '$tmpdir/oldtime'"
+echo "$newtime" >"$tmpdir/newtime" || die "Failed to write to '$tmpdir/newtime'"
+
+# Bisecting must be performed from the top level directory (even with --no-checkout)
+(
+ toplevel_dir=$(git rev-parse --show-toplevel) || die "Failed to find top level directory"
+ cd "$toplevel_dir" || die "Failed to cd into top level directory '$toplevel_dir'"
+
+ git bisect start --no-checkout "$newrev" "$oldrev" || die "Failed to start bisecting"
+
+ git bisect run t/perf/bisect_run_script "$test_script" "$test_number" "$tmpdir"
+ res="$?"
+
+ git bisect reset
+
+ exit "$res"
+)
diff --git a/t/perf/bisect_run_script b/t/perf/bisect_run_script
new file mode 100755
index 0000000..3ebaf15
--- /dev/null
+++ b/t/perf/bisect_run_script
@@ -0,0 +1,53 @@
+#!/bin/sh
+
+script="$1"
+test_number="$2"
+info_dir="$3"
+
+# This aborts the bisection immediately
+die () {
+ echo >&2 "error: $*"
+ exit 255
+}
+
+bisect_head=$(git rev-parse --verify BISECT_HEAD) || die "Failed to find BISECT_HEAD ref"
+
+script_number=$(echo "$script" | sed -e "s/^p\([0-9]*\).*\$/\1/") || die "Failed to get script number for '$script'"
+
+oldtime=$(cat "$info_dir/oldtime") || die "Failed to access '$info_dir/oldtime'"
+newtime=$(cat "$info_dir/newtime") || die "Failed to access '$info_dir/newtime'"
+
+cd t/perf || die "Failed to cd into 't/perf'"
+
+result_file="$info_dir/perf_${script_number}_${bisect_head}_results.txt"
+
+GIT_PERF_DIRS_OR_REVS="$bisect_head"
+export GIT_PERF_DIRS_OR_REVS
+
+# Don't use codespeed
+GIT_PERF_CODESPEED_OUTPUT=
+GIT_PERF_SEND_TO_CODESPEED=
+export GIT_PERF_CODESPEED_OUTPUT
+export GIT_PERF_SEND_TO_CODESPEED
+
+./run "$script" >"$result_file" 2>&1 || die "Failed to run perf test '$script'"
+
+rtime=$(sed -n "s/^$script_number\.$test_number:.*\([0-9]\+\.[0-9]\+\)(.*).*\$/\1/p" "$result_file")
+
+echo "newtime: $newtime"
+echo "rtime: $rtime"
+echo "oldtime: $oldtime"
+
+# Compare ($newtime - $rtime) with ($rtime - $oldtime)
+# Times are decimal number, not integers
+
+if test $(echo "$newtime" "$rtime" "$oldtime" | awk '{ print ($1 - $2 > $2 - $3) }') = 1
+then
+ # Current commit is considered "good/old"
+ echo "$rtime" >"$info_dir/oldtime"
+ exit 0
+else
+ # Current commit is considered "bad/new"
+ echo "$rtime" >"$info_dir/newtime"
+ exit 1
+fi
diff --git a/t/perf/config b/t/perf/config
new file mode 100644
index 0000000..b92768b
--- /dev/null
+++ b/t/perf/config
@@ -0,0 +1,2 @@
+[gc]
+ auto = 0
diff --git a/t/perf/lib-bitmap.sh b/t/perf/lib-bitmap.sh
new file mode 100644
index 0000000..55a8feb
--- /dev/null
+++ b/t/perf/lib-bitmap.sh
@@ -0,0 +1,100 @@
+# Helper functions for testing bitmap performance; see p5310.
+
+test_full_bitmap () {
+ test_perf 'simulated clone' '
+ git pack-objects --stdout --all </dev/null >/dev/null
+ '
+
+ test_perf 'simulated fetch' '
+ have=$(git rev-list HEAD~100 -1) &&
+ {
+ echo HEAD &&
+ echo ^$have
+ } | git pack-objects --revs --stdout >/dev/null
+ '
+
+ test_perf 'pack to file (bitmap)' '
+ git pack-objects --use-bitmap-index --all pack1b </dev/null >/dev/null
+ '
+
+ test_perf 'rev-list (commits)' '
+ git rev-list --all --use-bitmap-index >/dev/null
+ '
+
+ test_perf 'rev-list (objects)' '
+ git rev-list --all --use-bitmap-index --objects >/dev/null
+ '
+
+ test_perf 'rev-list with tag negated via --not --all (objects)' '
+ git rev-list perf-tag --not --all --use-bitmap-index --objects >/dev/null
+ '
+
+ test_perf 'rev-list with negative tag (objects)' '
+ git rev-list HEAD --not perf-tag --use-bitmap-index --objects >/dev/null
+ '
+
+ test_perf 'rev-list count with blob:none' '
+ git rev-list --use-bitmap-index --count --objects --all \
+ --filter=blob:none >/dev/null
+ '
+
+ test_perf 'rev-list count with blob:limit=1k' '
+ git rev-list --use-bitmap-index --count --objects --all \
+ --filter=blob:limit=1k >/dev/null
+ '
+
+ test_perf 'rev-list count with tree:0' '
+ git rev-list --use-bitmap-index --count --objects --all \
+ --filter=tree:0 >/dev/null
+ '
+
+ test_perf 'simulated partial clone' '
+ git pack-objects --stdout --all --filter=blob:none </dev/null >/dev/null
+ '
+}
+
+test_partial_bitmap () {
+ test_perf 'clone (partial bitmap)' '
+ git pack-objects --stdout --all </dev/null >/dev/null
+ '
+
+ test_perf 'pack to file (partial bitmap)' '
+ git pack-objects --use-bitmap-index --all pack2b </dev/null >/dev/null
+ '
+
+ test_perf 'rev-list with tree filter (partial bitmap)' '
+ git rev-list --use-bitmap-index --count --objects --all \
+ --filter=tree:0 >/dev/null
+ '
+}
+
+test_pack_bitmap () {
+ test_perf "repack to disk" '
+ git repack -ad
+ '
+
+ test_full_bitmap
+
+ test_expect_success "create partial bitmap state" '
+ # pick a commit to represent the repo tip in the past
+ cutoff=$(git rev-list HEAD~100 -1) &&
+ orig_tip=$(git rev-parse HEAD) &&
+
+ # now kill off all of the refs and pretend we had
+ # just the one tip
+ rm -rf .git/logs .git/refs/* .git/packed-refs &&
+ git update-ref HEAD $cutoff &&
+
+ # and then repack, which will leave us with a nice
+ # big bitmap pack of the "old" history, and all of
+ # the new history will be loose, as if it had been pushed
+ # up incrementally and exploded via unpack-objects
+ git repack -Ad &&
+
+ # and now restore our original tip, as if the pushes
+ # had happened
+ git update-ref HEAD $orig_tip
+ '
+
+ test_partial_bitmap
+}
diff --git a/t/perf/lib-pack.sh b/t/perf/lib-pack.sh
new file mode 100644
index 0000000..d3865db
--- /dev/null
+++ b/t/perf/lib-pack.sh
@@ -0,0 +1,25 @@
+# Helpers for dealing with large numbers of packs.
+
+# create $1 nonsense packs, each with a single blob
+create_packs () {
+ perl -le '
+ my ($n) = @ARGV;
+ for (1..$n) {
+ print "blob";
+ print "data <<EOF";
+ print "$_";
+ print "EOF";
+ print "checkpoint"
+ }
+ ' "$@" |
+ git fast-import
+}
+
+# create a large number of packs, disabling any gc which might
+# cause us to repack them
+setup_many_packs () {
+ git config gc.auto 0 &&
+ git config gc.autopacklimit 0 &&
+ git config fastimport.unpacklimit 0 &&
+ create_packs 500
+}
diff --git a/t/perf/min_time.perl b/t/perf/min_time.perl
new file mode 100755
index 0000000..c1a2717
--- /dev/null
+++ b/t/perf/min_time.perl
@@ -0,0 +1,21 @@
+#!/usr/bin/perl
+
+my $minrt = 1e100;
+my $min;
+
+while (<>) {
+ # [h:]m:s.xx U.xx S.xx
+ /^(?:(\d+):)?(\d+):(\d+(?:\.\d+)?) (\d+(?:\.\d+)?) (\d+(?:\.\d+)?)$/
+ or die "bad input line: $_";
+ my $rt = ((defined $1 ? $1 : 0.0)*60+$2)*60+$3;
+ if ($rt < $minrt) {
+ $min = $_;
+ $minrt = $rt;
+ }
+}
+
+if (!defined $min) {
+ die "no input found";
+}
+
+print $min;
diff --git a/t/perf/p0000-perf-lib-sanity.sh b/t/perf/p0000-perf-lib-sanity.sh
new file mode 100755
index 0000000..002c21e
--- /dev/null
+++ b/t/perf/p0000-perf-lib-sanity.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+
+test_description='Tests whether perf-lib facilities work'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_perf 'test_perf_default_repo works' '
+ foo=$(git rev-parse HEAD) &&
+ test_export foo
+'
+
+test_checkout_worktree
+
+test_perf 'test_checkout_worktree works' '
+ wt=$(find . | wc -l) &&
+ idx=$(git ls-files | wc -l) &&
+ test $wt -gt $idx
+'
+
+baz=baz
+test_export baz
+
+test_expect_success 'test_export works' '
+ echo "$foo" &&
+ test "$foo" = "$(git rev-parse HEAD)" &&
+ echo "$baz" &&
+ test "$baz" = baz
+'
+
+test_perf 'export a weird var' '
+ bar="weird # variable" &&
+ test_export bar
+'
+
+test_perf 'éḿíẗ ńöń-ÁŚĆÍÍ ćḧáŕáćẗéŕś' 'true'
+
+test_expect_success 'test_export works with weird vars' '
+ echo "$bar" &&
+ test "$bar" = "weird # variable"
+'
+
+test_perf 'important variables available in subshells' '
+ test -n "$HOME" &&
+ test -n "$TEST_DIRECTORY" &&
+ test -n "$TRASH_DIRECTORY" &&
+ test -n "$GIT_BUILD_DIR"
+'
+
+test_perf 'test-lib-functions correctly loaded in subshells' '
+ : >a &&
+ test_path_is_file a &&
+ : >b &&
+ test_cmp a b
+'
+
+test_done
diff --git a/t/perf/p0001-rev-list.sh b/t/perf/p0001-rev-list.sh
new file mode 100755
index 0000000..3042a85
--- /dev/null
+++ b/t/perf/p0001-rev-list.sh
@@ -0,0 +1,48 @@
+#!/bin/sh
+
+test_description="Tests history walking performance"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_perf 'rev-list --all' '
+ git rev-list --all >/dev/null
+'
+
+test_perf 'rev-list --all --objects' '
+ git rev-list --all --objects >/dev/null
+'
+
+test_perf 'rev-list --parents' '
+ git rev-list --parents HEAD >/dev/null
+'
+
+test_expect_success 'create dummy file' '
+ echo unlikely-to-already-be-there >dummy &&
+ git add dummy &&
+ git commit -m dummy
+'
+
+test_perf 'rev-list -- dummy' '
+ git rev-list HEAD -- dummy
+'
+
+test_perf 'rev-list --parents -- dummy' '
+ git rev-list --parents HEAD -- dummy
+'
+
+test_expect_success 'create new unreferenced commit' '
+ commit=$(git commit-tree HEAD^{tree} -p HEAD) &&
+ test_export commit
+'
+
+test_perf 'rev-list $commit --not --all' '
+ git rev-list $commit --not --all >/dev/null
+'
+
+test_perf 'rev-list --objects $commit --not --all' '
+ git rev-list --objects $commit --not --all >/dev/null
+'
+
+test_done
diff --git a/t/perf/p0002-read-cache.sh b/t/perf/p0002-read-cache.sh
new file mode 100755
index 0000000..cdd105a
--- /dev/null
+++ b/t/perf/p0002-read-cache.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+test_description="Tests performance of reading the index"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+count=1000
+test_perf "read_cache/discard_cache $count times" "
+ test-tool read-cache $count
+"
+
+test_done
diff --git a/t/perf/p0003-delta-base-cache.sh b/t/perf/p0003-delta-base-cache.sh
new file mode 100755
index 0000000..62369ea
--- /dev/null
+++ b/t/perf/p0003-delta-base-cache.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+test_description='Test operations that emphasize the delta base cache.
+
+We look at both "log --raw", which should put only trees into the delta cache,
+and "log -Sfoo --raw", which should look at both trees and blobs.
+
+Any effects will be emphasized if the test repository is fully packed (loose
+objects obviously do not use the delta base cache at all). It is also
+emphasized if the pack has long delta chains (e.g., as produced by "gc
+--aggressive"), though cache is still quite noticeable even with the default
+depth of 50.
+
+The setting of core.deltaBaseCacheLimit in the source repository is also
+relevant (depending on the size of your test repo), so be sure it is consistent
+between runs.
+'
+. ./perf-lib.sh
+
+test_perf_large_repo
+
+# puts mostly trees into the delta base cache
+test_perf 'log --raw' '
+ git log --raw >/dev/null
+'
+
+test_perf 'log -S' '
+ git log --raw -Sfoo >/dev/null
+'
+
+test_done
diff --git a/t/perf/p0004-lazy-init-name-hash.sh b/t/perf/p0004-lazy-init-name-hash.sh
new file mode 100755
index 0000000..85be14e
--- /dev/null
+++ b/t/perf/p0004-lazy-init-name-hash.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+test_description='Tests multi-threaded lazy_init_name_hash'
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+test_expect_success 'verify both methods build the same hashmaps' '
+ test-tool lazy-init-name-hash --dump --single >out.single &&
+ if test-tool lazy-init-name-hash --dump --multi >out.multi
+ then
+ test_set_prereq REPO_BIG_ENOUGH_FOR_MULTI &&
+ sort <out.single >sorted.single &&
+ sort <out.multi >sorted.multi &&
+ test_cmp sorted.single sorted.multi
+ fi
+'
+
+test_expect_success 'calibrate' '
+ entries=$(wc -l <out.single) &&
+
+ case $entries in
+ ?) count=1000000 ;;
+ ??) count=100000 ;;
+ ???) count=10000 ;;
+ ????) count=1000 ;;
+ ?????) count=100 ;;
+ ??????) count=10 ;;
+ *) count=1 ;;
+ esac &&
+ export count &&
+
+ case $entries in
+ 1) entries_desc="1 entry" ;;
+ *) entries_desc="$entries entries" ;;
+ esac &&
+
+ case $count in
+ 1) count_desc="1 round" ;;
+ *) count_desc="$count rounds" ;;
+ esac &&
+
+ desc="$entries_desc, $count_desc" &&
+ export desc
+'
+
+test_perf "single-threaded, $desc" "
+ test-tool lazy-init-name-hash --single --count=$count
+"
+
+test_perf "multi-threaded, $desc" --prereq REPO_BIG_ENOUGH_FOR_MULTI "
+ test-tool lazy-init-name-hash --multi --count=$count
+"
+
+test_done
diff --git a/t/perf/p0005-status.sh b/t/perf/p0005-status.sh
new file mode 100755
index 0000000..ca58d6c
--- /dev/null
+++ b/t/perf/p0005-status.sh
@@ -0,0 +1,49 @@
+#!/bin/sh
+#
+# This test measures the performance of various read-tree
+# and status operations. It is primarily interested in
+# the algorithmic costs of index operations and recursive
+# tree traversal -- and NOT disk I/O on thousands of files.
+
+test_description="Tests performance of read-tree"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# If the test repo was generated by ./repos/many-files.sh
+# then we know something about the data shape and branches,
+# so we can isolate testing to the ballast-related commits
+# and setup sparse-checkout so we don't have to populate
+# the ballast files and directories.
+#
+# Otherwise, we make some general assumptions about the
+# repo and consider the entire history of the current
+# branch to be the ballast.
+
+test_expect_success "setup repo" '
+ if git rev-parse --verify refs/heads/p0006-ballast^{commit}
+ then
+ echo Assuming synthetic repo from many-files.sh &&
+ git branch br_base master &&
+ git branch br_ballast p0006-ballast &&
+ git config --local core.sparsecheckout 1 &&
+ cat >.git/info/sparse-checkout <<-EOF
+ /*
+ !ballast/*
+ EOF
+ else
+ echo Assuming non-synthetic repo... &&
+ git branch br_base $(git rev-list HEAD | tail -n 1) &&
+ git branch br_ballast HEAD
+ fi &&
+ git checkout -q br_ballast &&
+ nr_files=$(git ls-files | wc -l)
+'
+
+test_perf "read-tree status br_ballast ($nr_files)" '
+ git read-tree HEAD &&
+ git status
+'
+
+test_done
diff --git a/t/perf/p0006-read-tree-checkout.sh b/t/perf/p0006-read-tree-checkout.sh
new file mode 100755
index 0000000..325566e
--- /dev/null
+++ b/t/perf/p0006-read-tree-checkout.sh
@@ -0,0 +1,75 @@
+#!/bin/sh
+#
+# This test measures the performance of various read-tree
+# and checkout operations. It is primarily interested in
+# the algorithmic costs of index operations and recursive
+# tree traversal -- and NOT disk I/O on thousands of files.
+
+test_description="Tests performance of read-tree"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# If the test repo was generated by ./repos/many-files.sh
+# then we know something about the data shape and branches,
+# so we can isolate testing to the ballast-related commits
+# and setup sparse-checkout so we don't have to populate
+# the ballast files and directories.
+#
+# Otherwise, we make some general assumptions about the
+# repo and consider the entire history of the current
+# branch to be the ballast.
+
+test_expect_success "setup repo" '
+ if git rev-parse --verify refs/heads/p0006-ballast^{commit}
+ then
+ echo Assuming synthetic repo from many-files.sh &&
+ git branch br_base master &&
+ git branch br_ballast p0006-ballast^ &&
+ git branch br_ballast_alias p0006-ballast^ &&
+ git branch br_ballast_plus_1 p0006-ballast &&
+ git config --local core.sparsecheckout 1 &&
+ cat >.git/info/sparse-checkout <<-EOF
+ /*
+ !ballast/*
+ EOF
+ else
+ echo Assuming non-synthetic repo... &&
+ git branch br_base $(git rev-list HEAD | tail -n 1) &&
+ git branch br_ballast HEAD^ || error "no ancestor commit from current head" &&
+ git branch br_ballast_alias HEAD^ &&
+ git branch br_ballast_plus_1 HEAD
+ fi &&
+ git checkout -q br_ballast &&
+ nr_files=$(git ls-files | wc -l)
+'
+
+test_perf "read-tree br_base br_ballast ($nr_files)" '
+ git read-tree -n -m br_base br_ballast
+'
+
+test_perf "read-tree br_ballast_plus_1 ($nr_files)" '
+ # Run read-tree 100 times for clearer performance results & comparisons
+ for i in $(test_seq 100)
+ do
+ git read-tree -n -m br_ballast_plus_1 || return 1
+ done
+'
+
+test_perf "switch between br_base br_ballast ($nr_files)" '
+ git checkout -q br_base &&
+ git checkout -q br_ballast
+'
+
+test_perf "switch between br_ballast br_ballast_plus_1 ($nr_files)" '
+ git checkout -q br_ballast_plus_1 &&
+ git checkout -q br_ballast
+'
+
+test_perf "switch between aliases ($nr_files)" '
+ git checkout -q br_ballast_alias &&
+ git checkout -q br_ballast
+'
+
+test_done
diff --git a/t/perf/p0007-write-cache.sh b/t/perf/p0007-write-cache.sh
new file mode 100755
index 0000000..25d8ff7
--- /dev/null
+++ b/t/perf/p0007-write-cache.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+test_description="Tests performance of writing the index"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_expect_success "setup repo" '
+ if git rev-parse --verify refs/heads/p0006-ballast^{commit}
+ then
+ echo Assuming synthetic repo from many-files.sh &&
+ git config --local core.sparsecheckout 1 &&
+ cat >.git/info/sparse-checkout <<-EOF
+ /*
+ !ballast/*
+ EOF
+ else
+ echo Assuming non-synthetic repo...
+ fi &&
+ nr_files=$(git ls-files | wc -l)
+'
+
+count=3
+test_perf "write_locked_index $count times ($nr_files files)" "
+ test-tool write-cache $count
+"
+
+test_done
diff --git a/t/perf/p0008-odb-fsync.sh b/t/perf/p0008-odb-fsync.sh
new file mode 100755
index 0000000..b3a90f3
--- /dev/null
+++ b/t/perf/p0008-odb-fsync.sh
@@ -0,0 +1,82 @@
+#!/bin/sh
+#
+# This test measures the performance of adding new files to the object
+# database. The test was originally added to measure the effect of the
+# core.fsyncMethod=batch mode, which is why we are testing different values of
+# that setting explicitly and creating a lot of unique objects.
+
+test_description="Tests performance of adding things to the object database"
+
+. ./perf-lib.sh
+
+. $TEST_DIRECTORY/lib-unique-files.sh
+
+test_perf_fresh_repo
+test_checkout_worktree
+
+dir_count=10
+files_per_dir=50
+total_files=$((dir_count * files_per_dir))
+
+populate_files () {
+ test_create_unique_files $dir_count $files_per_dir files
+}
+
+setup_repo () {
+ (rm -rf .git || 1) &&
+ git init &&
+ test_commit first &&
+ populate_files
+}
+
+test_perf_fsync_cfgs () {
+ local method &&
+ local cfg &&
+ for method in none fsync batch writeout-only
+ do
+ case $method in
+ none)
+ cfg="-c core.fsync=none"
+ ;;
+ *)
+ cfg="-c core.fsync=loose-object -c core.fsyncMethod=$method"
+ esac &&
+
+ # Set GIT_TEST_FSYNC=1 explicitly since fsync is normally
+ # disabled by t/test-lib.sh.
+ if ! test_perf "$1 (fsyncMethod=$method)" \
+ --setup "$2" \
+ "GIT_TEST_FSYNC=1 git $cfg $3"
+ then
+ break
+ fi
+ done
+}
+
+test_perf_fsync_cfgs "add $total_files files" \
+ "setup_repo" \
+ "add -- files"
+
+test_perf_fsync_cfgs "stash $total_files files" \
+ "setup_repo" \
+ "stash push -u -- files"
+
+test_perf_fsync_cfgs "unpack $total_files files" \
+ "
+ setup_repo &&
+ git -c core.fsync=none add -- files &&
+ git -c core.fsync=none commit -q -m second &&
+ echo HEAD | git pack-objects -q --stdout --revs >test_pack.pack &&
+ setup_repo
+ " \
+ "unpack-objects -q <test_pack.pack"
+
+test_perf_fsync_cfgs "commit $total_files files" \
+ "
+ setup_repo &&
+ git -c core.fsync=none add -- files &&
+ populate_files
+ " \
+ "commit -q -a -m test"
+
+test_done
diff --git a/t/perf/p0071-sort.sh b/t/perf/p0071-sort.sh
new file mode 100755
index 0000000..ae4ddac
--- /dev/null
+++ b/t/perf/p0071-sort.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+test_description='Basic sort performance tests'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_expect_success 'setup' '
+ git ls-files --stage "*.[ch]" "*.sh" |
+ cut -f2 -d" " |
+ git cat-file --batch >unsorted
+'
+
+test_perf 'sort(1) unsorted' '
+ sort <unsorted >sorted
+'
+
+test_expect_success 'reverse' '
+ sort -r <unsorted >reversed
+'
+
+for file in sorted reversed
+do
+ test_perf "sort(1) $file" "
+ sort <$file >actual
+ "
+done
+
+for file in unsorted sorted reversed
+do
+
+ test_perf "string_list_sort() $file" "
+ test-tool string-list sort <$file >actual
+ "
+
+ test_expect_success "string_list_sort() $file sorts like sort(1)" "
+ test_cmp_bin sorted actual
+ "
+done
+
+for file in unsorted sorted reversed
+do
+ test_perf "DEFINE_LIST_SORT $file" "
+ test-tool mergesort sort <$file >actual
+ "
+
+ test_expect_success "DEFINE_LIST_SORT $file sorts like sort(1)" "
+ test_cmp_bin sorted actual
+ "
+done
+
+test_done
diff --git a/t/perf/p0090-cache-tree.sh b/t/perf/p0090-cache-tree.sh
new file mode 100755
index 0000000..a8eabca
--- /dev/null
+++ b/t/perf/p0090-cache-tree.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+test_description="Tests performance of cache tree update operations"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+count=100
+
+test_expect_success 'setup cache tree' '
+ git write-tree
+'
+
+test_cache_tree () {
+ test_perf "$1, $3" "
+ for i in \$(test_seq $count)
+ do
+ test-tool cache-tree $4 $2
+ done
+ "
+}
+
+test_cache_tree_update_functions () {
+ test_cache_tree 'no-op' 'control' "$1" "$2"
+ test_cache_tree 'prime_cache_tree' 'prime' "$1" "$2"
+ test_cache_tree 'cache_tree_update' 'update' "$1" "$2"
+}
+
+test_cache_tree_update_functions "clean" ""
+test_cache_tree_update_functions "invalidate 2" "--invalidate 2"
+test_cache_tree_update_functions "invalidate 50" "--invalidate 50"
+test_cache_tree_update_functions "empty" "--empty"
+
+test_done
diff --git a/t/perf/p0100-globbing.sh b/t/perf/p0100-globbing.sh
new file mode 100755
index 0000000..439e9c8
--- /dev/null
+++ b/t/perf/p0100-globbing.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+test_description="Tests pathological globbing performance
+
+Shows how Git's globbing performance performs when given the sort of
+pathological patterns described in at https://research.swtch.com/glob
+"
+
+. ./perf-lib.sh
+
+test_globs_big='10 25 50 75 100'
+test_globs_small='1 2 3 4 5 6'
+
+test_perf_fresh_repo
+
+test_expect_success 'setup' '
+ for i in $(test_seq 1 100)
+ do
+ printf "a" >>refname &&
+ for j in $(test_seq 1 $i)
+ do
+ printf "a*" >>refglob.$i || return 1
+ done &&
+ echo b >>refglob.$i || return 1
+ done &&
+ test_commit test $(cat refname).t "" $(cat refname).t
+'
+
+for i in $test_globs_small
+do
+ test_perf "refglob((a*)^nb) against tag (a^100).t; n = $i" '
+ git for-each-ref "refs/tags/$(cat refglob.'$i')b"
+ '
+done
+
+for i in $test_globs_small
+do
+ test_perf "fileglob((a*)^nb) against file (a^100).t; n = $i" '
+ git ls-files "$(cat refglob.'$i')b"
+ '
+done
+
+test_done
diff --git a/t/perf/p1006-cat-file.sh b/t/perf/p1006-cat-file.sh
new file mode 100755
index 0000000..dcd8015
--- /dev/null
+++ b/t/perf/p1006-cat-file.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+test_description='Tests listing object info performance'
+. ./perf-lib.sh
+
+test_perf_large_repo
+
+test_perf 'cat-file --batch-check' '
+ git cat-file --batch-all-objects --batch-check
+'
+
+test_done
diff --git a/t/perf/p1400-update-ref.sh b/t/perf/p1400-update-ref.sh
new file mode 100755
index 0000000..a75969c
--- /dev/null
+++ b/t/perf/p1400-update-ref.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+test_description="Tests performance of update-ref"
+
+. ./perf-lib.sh
+
+test_perf_fresh_repo
+
+test_expect_success "setup" '
+ test_commit PRE &&
+ test_commit POST &&
+ for i in $(test_seq 5000)
+ do
+ printf "start\ncreate refs/heads/%d PRE\ncommit\n" $i &&
+ printf "start\nupdate refs/heads/%d POST PRE\ncommit\n" $i &&
+ printf "start\ndelete refs/heads/%d POST\ncommit\n" $i || return 1
+ done >instructions
+'
+
+test_perf "update-ref" '
+ for i in $(test_seq 1000)
+ do
+ git update-ref refs/heads/branch PRE &&
+ git update-ref refs/heads/branch POST PRE &&
+ git update-ref -d refs/heads/branch || return 1
+ done
+'
+
+test_perf "update-ref --stdin" '
+ git update-ref --stdin <instructions >/dev/null
+'
+
+test_done
diff --git a/t/perf/p1450-fsck.sh b/t/perf/p1450-fsck.sh
new file mode 100755
index 0000000..ae1b841
--- /dev/null
+++ b/t/perf/p1450-fsck.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+test_description='Test fsck performance'
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+
+test_perf 'fsck' '
+ git fsck
+'
+
+test_done
diff --git a/t/perf/p1451-fsck-skip-list.sh b/t/perf/p1451-fsck-skip-list.sh
new file mode 100755
index 0000000..f767d83
--- /dev/null
+++ b/t/perf/p1451-fsck-skip-list.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+test_description='Test fsck skipList performance'
+
+. ./perf-lib.sh
+
+test_perf_fresh_repo
+
+n=1000000
+
+test_expect_success "setup $n bad commits" '
+ for i in $(test_seq 1 $n)
+ do
+ echo "commit refs/heads/master" &&
+ echo "committer C <c@example.com> 1234567890 +0000" &&
+ echo "data <<EOF" &&
+ echo "$i.Q." &&
+ echo "EOF" || return 1
+ done | q_to_nul | git fast-import
+'
+
+skip=0
+while test $skip -le $n
+do
+ test_expect_success "create skipList for $skip bad commits" '
+ git log --format=%H --max-count=$skip |
+ sort >skiplist
+ '
+
+ test_perf "fsck with $skip skipped bad commits" '
+ git -c fsck.skipList=skiplist fsck
+ '
+
+ case $skip in
+ 0) skip=1 ;;
+ *) skip=${skip}0 ;;
+ esac
+done
+
+test_done
diff --git a/t/perf/p1500-graph-walks.sh b/t/perf/p1500-graph-walks.sh
new file mode 100755
index 0000000..e14e762
--- /dev/null
+++ b/t/perf/p1500-graph-walks.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+test_description='Commit walk performance tests'
+. ./perf-lib.sh
+
+test_perf_large_repo
+
+test_expect_success 'setup' '
+ git for-each-ref --format="%(refname)" "refs/heads/*" "refs/tags/*" >allrefs &&
+ sort -r allrefs | head -n 50 >refs &&
+ for ref in $(cat refs)
+ do
+ git branch -f ref-$ref $ref &&
+ echo ref-$ref ||
+ return 1
+ done >branches &&
+ for ref in $(cat refs)
+ do
+ git tag -f tag-$ref $ref &&
+ echo tag-$ref ||
+ return 1
+ done >tags &&
+ git commit-graph write --reachable
+'
+
+test_perf 'ahead-behind counts: git for-each-ref' '
+ git for-each-ref --format="%(ahead-behind:HEAD)" --stdin <refs
+'
+
+test_perf 'ahead-behind counts: git branch' '
+ xargs git branch -l --format="%(ahead-behind:HEAD)" <branches
+'
+
+test_perf 'ahead-behind counts: git tag' '
+ xargs git tag -l --format="%(ahead-behind:HEAD)" <tags
+'
+
+test_perf 'contains: git for-each-ref --merged' '
+ git for-each-ref --merged=HEAD --stdin <refs
+'
+
+test_perf 'contains: git branch --merged' '
+ xargs git branch --merged=HEAD <branches
+'
+
+test_perf 'contains: git tag --merged' '
+ xargs git tag --merged=HEAD <tags
+'
+
+test_done
diff --git a/t/perf/p2000-sparse-operations.sh b/t/perf/p2000-sparse-operations.sh
new file mode 100755
index 0000000..39e92b0
--- /dev/null
+++ b/t/perf/p2000-sparse-operations.sh
@@ -0,0 +1,139 @@
+#!/bin/sh
+
+test_description="test performance of Git operations using the index"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+SPARSE_CONE=f2/f4
+
+test_expect_success 'setup repo and indexes' '
+ git reset --hard HEAD &&
+
+ # Remove submodules from the example repo, because our
+ # duplication of the entire repo creates an unlikely data shape.
+ if git config --file .gitmodules --get-regexp "submodule.*.path" >modules
+ then
+ git rm $(awk "{print \$2}" modules) &&
+ git commit -m "remove submodules" || return 1
+ fi &&
+
+ echo bogus >a &&
+ cp a b &&
+ git add a b &&
+ git commit -m "level 0" &&
+ BLOB=$(git rev-parse HEAD:a) &&
+ OLD_COMMIT=$(git rev-parse HEAD) &&
+ OLD_TREE=$(git rev-parse HEAD^{tree}) &&
+
+ for i in $(test_seq 1 3)
+ do
+ cat >in <<-EOF &&
+ 100755 blob $BLOB a
+ 040000 tree $OLD_TREE f1
+ 040000 tree $OLD_TREE f2
+ 040000 tree $OLD_TREE f3
+ 040000 tree $OLD_TREE f4
+ EOF
+ NEW_TREE=$(git mktree <in) &&
+ NEW_COMMIT=$(git commit-tree $NEW_TREE -p $OLD_COMMIT -m "level $i") &&
+ OLD_TREE=$NEW_TREE &&
+ OLD_COMMIT=$NEW_COMMIT || return 1
+ done &&
+
+ git sparse-checkout init --cone &&
+ git tag -a v1.0 -m "Final" &&
+ git sparse-checkout set $SPARSE_CONE &&
+ git checkout -b wide $OLD_COMMIT &&
+
+ for l2 in f1 f2 f3 f4
+ do
+ echo more bogus >>$SPARSE_CONE/$l2/a &&
+ git commit -a -m "edit $SPARSE_CONE/$l2/a" || return 1
+ done &&
+
+ git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . full-v3 &&
+ (
+ cd full-v3 &&
+ git sparse-checkout init --cone &&
+ git sparse-checkout set $SPARSE_CONE &&
+ git config index.version 3 &&
+ git update-index --index-version=3 &&
+ git checkout HEAD~4
+ ) &&
+ git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . full-v4 &&
+ (
+ cd full-v4 &&
+ git sparse-checkout init --cone &&
+ git sparse-checkout set $SPARSE_CONE &&
+ git config index.version 4 &&
+ git update-index --index-version=4 &&
+ git checkout HEAD~4
+ ) &&
+ git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . sparse-v3 &&
+ (
+ cd sparse-v3 &&
+ git sparse-checkout init --cone --sparse-index &&
+ git sparse-checkout set $SPARSE_CONE &&
+ git config index.version 3 &&
+ git update-index --index-version=3 &&
+ git checkout HEAD~4
+ ) &&
+ git -c core.sparseCheckoutCone=true clone --branch=wide --sparse . sparse-v4 &&
+ (
+ cd sparse-v4 &&
+ git sparse-checkout init --cone --sparse-index &&
+ git sparse-checkout set $SPARSE_CONE &&
+ git config index.version 4 &&
+ git update-index --index-version=4 &&
+ git checkout HEAD~4
+ )
+'
+
+test_perf_on_all () {
+ command="$@"
+ for repo in full-v3 full-v4 \
+ sparse-v3 sparse-v4
+ do
+ test_perf "$command ($repo)" "
+ (
+ cd $repo &&
+ echo >>$SPARSE_CONE/a &&
+ $command
+ )
+ "
+ done
+}
+
+test_perf_on_all git status
+test_perf_on_all 'git stash && git stash pop'
+test_perf_on_all 'echo >>new && git stash -u && git stash pop'
+test_perf_on_all git add -A
+test_perf_on_all git add .
+test_perf_on_all git commit -a -m A
+test_perf_on_all git checkout -f -
+test_perf_on_all "git sparse-checkout add f2/f3/f1 && git sparse-checkout set $SPARSE_CONE"
+test_perf_on_all git reset
+test_perf_on_all git reset --hard
+test_perf_on_all git reset -- does-not-exist
+test_perf_on_all git diff
+test_perf_on_all git diff --cached
+test_perf_on_all git blame $SPARSE_CONE/a
+test_perf_on_all git blame $SPARSE_CONE/f3/a
+test_perf_on_all git read-tree -mu HEAD
+test_perf_on_all git checkout-index -f --all
+test_perf_on_all git update-index --add --remove $SPARSE_CONE/a
+test_perf_on_all "git rm -f $SPARSE_CONE/a && git checkout HEAD -- $SPARSE_CONE/a"
+test_perf_on_all git grep --cached bogus -- "f2/f1/f1/*"
+test_perf_on_all git write-tree
+test_perf_on_all git describe --dirty
+test_perf_on_all 'echo >>new && git describe --dirty'
+test_perf_on_all git diff-files
+test_perf_on_all git diff-files -- $SPARSE_CONE/a
+test_perf_on_all git diff-tree HEAD
+test_perf_on_all git diff-tree HEAD -- $SPARSE_CONE/a
+test_perf_on_all "git worktree add ../temp && git worktree remove ../temp"
+test_perf_on_all git check-attr -a -- $SPARSE_CONE/a
+
+test_done
diff --git a/t/perf/p3400-rebase.sh b/t/perf/p3400-rebase.sh
new file mode 100755
index 0000000..e6b0277
--- /dev/null
+++ b/t/perf/p3400-rebase.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+test_description='Tests rebase performance'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_expect_success 'setup rebasing on top of a lot of changes' '
+ git checkout -f -B base &&
+ git checkout -B to-rebase &&
+ git checkout -B upstream &&
+ for i in $(test_seq 100)
+ do
+ # simulate huge diffs
+ echo change$i >unrelated-file$i &&
+ test_seq 1000 >>unrelated-file$i &&
+ git add unrelated-file$i &&
+ test_tick &&
+ git commit -m commit$i unrelated-file$i &&
+ echo change$i >unrelated-file$i &&
+ test_seq 1000 | sort -nr >>unrelated-file$i &&
+ git add unrelated-file$i &&
+ test_tick &&
+ git commit -m commit$i-reverse unrelated-file$i ||
+ return 1
+ done &&
+ git checkout to-rebase &&
+ test_commit our-patch interesting-file
+'
+
+test_perf 'rebase on top of a lot of unrelated changes' '
+ git rebase --onto upstream HEAD^ &&
+ git rebase --onto base HEAD^
+'
+
+test_expect_success 'setup rebasing many changes without split-index' '
+ git config core.splitIndex false &&
+ git checkout -B upstream2 to-rebase &&
+ git checkout -B to-rebase2 upstream
+'
+
+test_perf 'rebase a lot of unrelated changes without split-index' '
+ git rebase --onto upstream2 base &&
+ git rebase --onto base upstream2
+'
+
+test_expect_success 'setup rebasing many changes with split-index' '
+ git config core.splitIndex true
+'
+
+test_perf 'rebase a lot of unrelated changes with split-index' '
+ git rebase --onto upstream2 base &&
+ git rebase --onto base upstream2
+'
+
+test_done
diff --git a/t/perf/p3404-rebase-interactive.sh b/t/perf/p3404-rebase-interactive.sh
new file mode 100755
index 0000000..88f47de
--- /dev/null
+++ b/t/perf/p3404-rebase-interactive.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+test_description='Tests rebase -i performance'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# This commit merges a sufficiently long topic branch for reasonable
+# performance testing
+branch_merge=ba5312da19c6fdb6c6747d479f58932aae6e900c^{commit}
+export branch_merge
+
+git rev-parse --verify $branch_merge >/dev/null 2>&1 || {
+ skip_all='skipping because $branch_merge was not found'
+ test_done
+}
+
+write_script swap-first-two.sh <<\EOF
+case "$1" in
+*/COMMIT_EDITMSG)
+ mv "$1" "$1".bak &&
+ sed -e '1{h;d}' -e 2G <"$1".bak >"$1"
+ ;;
+esac
+EOF
+
+test_expect_success 'setup' '
+ git config core.editor "\"$PWD"/swap-first-two.sh\" &&
+ git checkout -f $branch_merge^2
+'
+
+test_perf 'rebase -i' '
+ git rebase -i $branch_merge^
+'
+
+test_done
diff --git a/t/perf/p4000-diff-algorithms.sh b/t/perf/p4000-diff-algorithms.sh
new file mode 100755
index 0000000..7e00c9d
--- /dev/null
+++ b/t/perf/p4000-diff-algorithms.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+test_description="Tests diff generation performance"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_perf 'log -3000 (baseline)' '
+ git log -3000 >/dev/null
+'
+
+test_perf 'log --raw -3000 (tree-only)' '
+ git log --raw -3000 >/dev/null
+'
+
+test_perf 'log -p -3000 (Myers)' '
+ git log -p -3000 >/dev/null
+'
+
+test_perf 'log -p -3000 --histogram' '
+ git log -p -3000 --histogram >/dev/null
+'
+
+test_perf 'log -p -3000 --patience' '
+ git log -p -3000 --patience >/dev/null
+'
+
+test_done
diff --git a/t/perf/p4001-diff-no-index.sh b/t/perf/p4001-diff-no-index.sh
new file mode 100755
index 0000000..683be69
--- /dev/null
+++ b/t/perf/p4001-diff-no-index.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+test_description="Test diff --no-index performance"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+file1=$(git ls-files | tail -n 2 | head -1)
+file2=$(git ls-files | tail -n 1 | head -1)
+
+test_expect_success "empty files, so they take no time to diff" "
+ echo >$file1 &&
+ echo >$file2
+"
+
+test_perf "diff --no-index" "
+ git diff --no-index $file1 $file2 >/dev/null
+"
+
+test_done
diff --git a/t/perf/p4002-diff-color-moved.sh b/t/perf/p4002-diff-color-moved.sh
new file mode 100755
index 0000000..ab2af93
--- /dev/null
+++ b/t/perf/p4002-diff-color-moved.sh
@@ -0,0 +1,57 @@
+#!/bin/sh
+
+test_description='Tests diff --color-moved performance'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# The endpoints of the diff can be customized by setting TEST_REV_A
+# and TEST_REV_B in the environment when running this test.
+
+rev="${TEST_REV_A:-v2.28.0}"
+if ! rev_a="$(git rev-parse --quiet --verify "$rev")"
+then
+ skip_all="skipping because '$rev' was not found. \
+ Use TEST_REV_A and TEST_REV_B to set the revs to use"
+ test_done
+fi
+rev="${TEST_REV_B:-v2.29.0}"
+if ! rev_b="$(git rev-parse --quiet --verify "$rev")"
+then
+ skip_all="skipping because '$rev' was not found. \
+ Use TEST_REV_A and TEST_REV_B to set the revs to use"
+ test_done
+fi
+
+GIT_PAGER_IN_USE=1
+test_export GIT_PAGER_IN_USE rev_a rev_b
+
+test_perf 'diff --no-color-moved --no-color-moved-ws large change' '
+ git diff --no-color-moved --no-color-moved-ws $rev_a $rev_b
+'
+
+test_perf 'diff --color-moved --no-color-moved-ws large change' '
+ git diff --color-moved=zebra --no-color-moved-ws $rev_a $rev_b
+'
+
+test_perf 'diff --color-moved-ws=allow-indentation-change large change' '
+ git diff --color-moved=zebra --color-moved-ws=allow-indentation-change \
+ $rev_a $rev_b
+'
+
+test_perf 'log --no-color-moved --no-color-moved-ws' '
+ git log --no-color-moved --no-color-moved-ws --no-merges --patch \
+ -n1000 $rev_b
+'
+
+test_perf 'log --color-moved --no-color-moved-ws' '
+ git log --color-moved=zebra --no-color-moved-ws --no-merges --patch \
+ -n1000 $rev_b
+'
+
+test_perf 'log --color-moved-ws=allow-indentation-change' '
+ git log --color-moved=zebra --color-moved-ws=allow-indentation-change \
+ --no-merges --patch -n1000 $rev_b
+'
+
+test_done
diff --git a/t/perf/p4205-log-pretty-formats.sh b/t/perf/p4205-log-pretty-formats.sh
new file mode 100755
index 0000000..609fecd
--- /dev/null
+++ b/t/perf/p4205-log-pretty-formats.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+test_description='Tests the performance of various pretty format placeholders'
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+for format in %H %h %T %t %P %p %h-%h-%h %an-%ae-%s
+do
+ test_perf "log with $format" "
+ git log --format=\"$format\" >/dev/null
+ "
+done
+
+test_done
diff --git a/t/perf/p4209-pickaxe.sh b/t/perf/p4209-pickaxe.sh
new file mode 100755
index 0000000..f585a44
--- /dev/null
+++ b/t/perf/p4209-pickaxe.sh
@@ -0,0 +1,70 @@
+#!/bin/sh
+
+test_description="Test pickaxe performance"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# Not --max-count, as that's the number of matching commit, so it's
+# unbounded. We want to limit our revision walk here.
+from_rev_desc=
+from_rev=
+max_count=1000
+if test_have_prereq EXPENSIVE
+then
+ max_count=10000
+fi
+from_rev=" $(git rev-list HEAD | head -n $max_count | tail -n 1).."
+from_rev_desc=" <limit-rev>.."
+
+for icase in \
+ '' \
+ '-i '
+do
+ # -S (no regex)
+ for pattern in \
+ 'int main' \
+ 'æ'
+ do
+ for opts in \
+ '-S'
+ do
+ test_perf "git log $icase$opts'$pattern'$from_rev_desc" "
+ git log --pretty=format:%H $icase$opts'$pattern'$from_rev
+ "
+ done
+ done
+
+ # -S (regex)
+ for pattern in \
+ '(int|void|null)' \
+ 'if *\([^ ]+ & ' \
+ '[àáâãäåæñøùúûüýþ]'
+ do
+ for opts in \
+ '--pickaxe-regex -S'
+ do
+ test_perf "git log $icase$opts'$pattern'$from_rev_desc" "
+ git log --pretty=format:%H $icase$opts'$pattern'$from_rev
+ "
+ done
+ done
+
+ # -G
+ for pattern in \
+ '(int|void|null)' \
+ 'if *\([^ ]+ & ' \
+ '[àáâãäåæñøùúûüýþ]'
+ do
+ for opts in \
+ '-G'
+ do
+ test_perf "git log $icase$opts'$pattern'$from_rev_desc" "
+ git log --pretty=format:%H $icase$opts'$pattern'$from_rev
+ "
+ done
+ done
+done
+
+test_done
diff --git a/t/perf/p4211-line-log.sh b/t/perf/p4211-line-log.sh
new file mode 100755
index 0000000..392bcc0
--- /dev/null
+++ b/t/perf/p4211-line-log.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+
+test_description='Tests log -L performance'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# Pick a file to log pseudo-randomly. The sort key is the blob hash,
+# so it is stable.
+test_expect_success 'select a file' '
+ git ls-tree HEAD | grep ^100644 |
+ sort -k 3 | head -1 | cut -f 2 >filelist
+'
+
+file=$(cat filelist)
+export file
+
+test_perf 'git rev-list --topo-order (baseline)' '
+ git rev-list --topo-order HEAD >/dev/null
+'
+
+test_perf 'git log --follow (baseline for -M)' '
+ git log --oneline --follow -- "$file" >/dev/null
+'
+
+test_perf 'git log -L (renames off)' '
+ git log --no-renames -L 1:"$file" >/dev/null
+'
+
+test_perf 'git log -L (renames on)' '
+ git log -M -L 1:"$file" >/dev/null
+'
+
+test_perf 'git log --oneline --raw --parents' '
+ git log --oneline --raw --parents >/dev/null
+'
+
+test_perf 'git log --oneline --raw --parents -1000' '
+ git log --oneline --raw --parents -1000 >/dev/null
+'
+
+test_done
diff --git a/t/perf/p4220-log-grep-engines.sh b/t/perf/p4220-log-grep-engines.sh
new file mode 100755
index 0000000..03fbfbb
--- /dev/null
+++ b/t/perf/p4220-log-grep-engines.sh
@@ -0,0 +1,54 @@
+#!/bin/sh
+
+test_description="Comparison of git-log's --grep regex engines
+
+Set GIT_PERF_4220_LOG_OPTS in the environment to pass options to
+git-grep. Make sure to include a leading space,
+e.g. GIT_PERF_4220_LOG_OPTS=' -i'. Some options to try:
+
+ -i
+ --invert-grep
+ -i --invert-grep
+"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+for pattern in \
+ 'how.to' \
+ '^how to' \
+ '[how] to' \
+ '\(e.t[^ ]*\|v.ry\) rare' \
+ 'm\(ú\|u\)lt.b\(æ\|y\)te'
+do
+ for engine in basic extended perl
+ do
+ if test $engine != "basic"
+ then
+ # Poor man's basic -> extended converter.
+ pattern=$(echo $pattern | sed 's/\\//g')
+ fi
+ if test $engine = "perl" && ! test_have_prereq PCRE
+ then
+ prereq="PCRE"
+ else
+ prereq=""
+ fi
+ test_perf "$engine log$GIT_PERF_4220_LOG_OPTS --grep='$pattern'" \
+ --prereq "$prereq" "
+ git -c grep.patternType=$engine log --pretty=format:%h$GIT_PERF_4220_LOG_OPTS --grep='$pattern' >'out.$engine' || :
+ "
+ done
+
+ test_expect_success "assert that all engines found the same for$GIT_PERF_4220_LOG_OPTS '$pattern'" '
+ test_cmp out.basic out.extended &&
+ if test_have_prereq PCRE
+ then
+ test_cmp out.basic out.perl
+ fi
+ '
+done
+
+test_done
diff --git a/t/perf/p4221-log-grep-engines-fixed.sh b/t/perf/p4221-log-grep-engines-fixed.sh
new file mode 100755
index 0000000..0a6d6df
--- /dev/null
+++ b/t/perf/p4221-log-grep-engines-fixed.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+test_description="Comparison of git-log's --grep regex engines with -F
+
+Set GIT_PERF_4221_LOG_OPTS in the environment to pass options to
+git-grep. Make sure to include a leading space,
+e.g. GIT_PERF_4221_LOG_OPTS=' -i'. Some options to try:
+
+ -i
+ --invert-grep
+ -i --invert-grep
+"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+for pattern in 'int' 'uncommon' 'æ'
+do
+ for engine in fixed basic extended perl
+ do
+ if test $engine = "perl" && ! test_have_prereq PCRE
+ then
+ prereq="PCRE"
+ else
+ prereq=""
+ fi
+ test_perf "$engine log$GIT_PERF_4221_LOG_OPTS --grep='$pattern'" \
+ --prereq "$prereq" "
+ git -c grep.patternType=$engine log --pretty=format:%h$GIT_PERF_4221_LOG_OPTS --grep='$pattern' >'out.$engine' || :
+ "
+ done
+
+ test_expect_success "assert that all engines found the same for$GIT_PERF_4221_LOG_OPTS '$pattern'" '
+ test_cmp out.fixed out.basic &&
+ test_cmp out.fixed out.extended &&
+ if test_have_prereq PCRE
+ then
+ test_cmp out.fixed out.perl
+ fi
+ '
+done
+
+test_done
diff --git a/t/perf/p5302-pack-index.sh b/t/perf/p5302-pack-index.sh
new file mode 100755
index 0000000..14c601b
--- /dev/null
+++ b/t/perf/p5302-pack-index.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+
+test_description="Tests index-pack performance"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+
+test_expect_success 'repack' '
+ git repack -ad &&
+ PACK=$(ls .git/objects/pack/*.pack | head -n1) &&
+ test -f "$PACK" &&
+ export PACK
+'
+
+# Rather than counting up and doubling each time, count down from the endpoint,
+# halving each time. That ensures that our final test uses as many threads as
+# CPUs, even if it isn't a power of 2.
+test_expect_success 'set up thread-counting tests' '
+ t=$(test-tool online-cpus) &&
+ threads= &&
+ while test $t -gt 0
+ do
+ threads="$t $threads" &&
+ t=$((t / 2)) || return 1
+ done
+'
+
+test_perf 'index-pack 0 threads' --prereq PERF_EXTRA \
+ --setup 'rm -rf repo.git && git init --bare repo.git' '
+ GIT_DIR=repo.git git index-pack --threads=1 --stdin < $PACK
+'
+
+for t in $threads
+do
+ THREADS=$t
+ export THREADS
+ test_perf "index-pack $t threads" --prereq PERF_EXTRA \
+ --setup 'rm -rf repo.git && git init --bare repo.git' '
+ GIT_DIR=repo.git GIT_FORCE_THREADS=1 \
+ git index-pack --threads=$THREADS --stdin <$PACK
+ '
+done
+
+test_perf 'index-pack default number of threads' \
+ --setup 'rm -rf repo.git && git init --bare repo.git' '
+ GIT_DIR=repo.git git index-pack --stdin < $PACK
+'
+
+test_done
diff --git a/t/perf/p5303-many-packs.sh b/t/perf/p5303-many-packs.sh
new file mode 100755
index 0000000..af173a7
--- /dev/null
+++ b/t/perf/p5303-many-packs.sh
@@ -0,0 +1,144 @@
+#!/bin/sh
+
+test_description='performance with large numbers of packs'
+. ./perf-lib.sh
+
+test_perf_large_repo
+
+# A real many-pack situation would probably come from having a lot of pushes
+# over time. We don't know how big each push would be, but we can fake it by
+# just walking the first-parent chain and having every 5 commits be their own
+# "push". This isn't _entirely_ accurate, as real pushes would have some
+# duplicate objects due to thin-pack fixing, but it's a reasonable
+# approximation.
+#
+# And then all of the rest of the objects can go in a single packfile that
+# represents the state before any of those pushes (actually, we'll generate
+# that first because in such a setup it would be the oldest pack, and we sort
+# the packs by reverse mtime inside git).
+repack_into_n () {
+ rm -rf staging &&
+ mkdir staging &&
+
+ git rev-list --first-parent HEAD |
+ perl -e '
+ my $n = shift;
+ while (<>) {
+ last unless @commits < $n;
+ push @commits, $_ if $. % 5 == 1;
+ }
+ print reverse @commits;
+ ' "$1" >pushes &&
+
+ # create base packfile
+ base_pack=$(
+ head -n 1 pushes |
+ git pack-objects --delta-base-offset --revs staging/pack
+ ) &&
+ test_export base_pack &&
+
+ # create an empty packfile
+ empty_pack=$(git pack-objects staging/pack </dev/null) &&
+ test_export empty_pack &&
+
+ # and then incrementals between each pair of commits
+ last= &&
+ while read rev
+ do
+ if test -n "$last"; then
+ {
+ echo "$rev" &&
+ echo "^$last"
+ } |
+ git pack-objects --delta-base-offset --revs \
+ staging/pack || return 1
+ fi
+ last=$rev
+ done <pushes &&
+
+ (
+ find staging -type f -name 'pack-*.pack' |
+ xargs -n 1 basename | grep -v "$base_pack" &&
+ printf "^pack-%s.pack\n" $base_pack
+ ) >stdin.packs
+
+ # and install the whole thing
+ rm -f .git/objects/pack/* &&
+ mv staging/* .git/objects/pack/
+}
+
+# Pretend we just have a single branch and no reflogs, and that everything is
+# in objects/pack; that makes our fake pack-building via repack_into_n()
+# much simpler.
+test_expect_success 'simplify reachability' '
+ tip=$(git rev-parse --verify HEAD) &&
+ git for-each-ref --format="option no-deref%0adelete %(refname)" |
+ git update-ref --stdin &&
+ rm -rf .git/logs &&
+ git update-ref refs/heads/master $tip &&
+ git symbolic-ref HEAD refs/heads/master &&
+ git repack -ad
+'
+
+for nr_packs in 1 50 1000
+do
+ test_expect_success "create $nr_packs-pack scenario" '
+ repack_into_n $nr_packs
+ '
+
+ test_perf "rev-list ($nr_packs)" '
+ git rev-list --objects --all >/dev/null
+ '
+
+ test_perf "abbrev-commit ($nr_packs)" '
+ git rev-list --abbrev-commit HEAD >/dev/null
+ '
+
+ # This simulates the interesting part of the repack, which is the
+ # actual pack generation, without smudging the on-disk setup
+ # between trials.
+ test_perf "repack ($nr_packs)" '
+ GIT_TEST_FULL_IN_PACK_ARRAY=1 \
+ git pack-objects --keep-true-parents \
+ --honor-pack-keep --non-empty --all \
+ --reflog --indexed-objects --delta-base-offset \
+ --stdout </dev/null >/dev/null
+ '
+
+ test_perf "repack with kept ($nr_packs)" '
+ git pack-objects --keep-true-parents \
+ --keep-pack=pack-$empty_pack.pack \
+ --honor-pack-keep --non-empty --all \
+ --reflog --indexed-objects --delta-base-offset \
+ --stdout </dev/null >/dev/null
+ '
+
+ test_perf "repack with --stdin-packs ($nr_packs)" '
+ git pack-objects \
+ --keep-true-parents \
+ --stdin-packs \
+ --non-empty \
+ --delta-base-offset \
+ --stdout <stdin.packs >/dev/null
+ '
+done
+
+# Measure pack loading with 10,000 packs.
+test_expect_success 'generate lots of packs' '
+ for i in $(test_seq 10000); do
+ echo "blob" &&
+ echo "data <<EOF" &&
+ echo "blob $i" &&
+ echo "EOF" &&
+ echo "checkpoint" || return 1
+ done |
+ git -c fastimport.unpackLimit=0 fast-import
+'
+
+# The purpose of this test is to evaluate load time for a large number
+# of packs while doing as little other work as possible.
+test_perf "load 10,000 packs" '
+ git rev-parse --verify "HEAD^{commit}"
+'
+
+test_done
diff --git a/t/perf/p5304-prune.sh b/t/perf/p5304-prune.sh
new file mode 100755
index 0000000..83baedb
--- /dev/null
+++ b/t/perf/p5304-prune.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+test_description='performance tests of prune'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_expect_success 'remove reachable loose objects' '
+ git repack -ad
+'
+
+test_expect_success 'remove unreachable loose objects' '
+ git prune
+'
+
+test_expect_success 'confirm there are no loose objects' '
+ git count-objects | grep ^0
+'
+
+test_perf 'prune with no objects' '
+ git prune
+'
+
+test_expect_success 'repack with bitmaps' '
+ git repack -adb
+'
+
+# We have to create the object in each trial run, since otherwise
+# runs after the first see no object and just skip the traversal entirely!
+test_perf 'prune with bitmaps' '
+ echo "probably not present in repo" | git hash-object -w --stdin &&
+ git prune
+'
+
+test_done
diff --git a/t/perf/p5310-pack-bitmaps.sh b/t/perf/p5310-pack-bitmaps.sh
new file mode 100755
index 0000000..b1399f1
--- /dev/null
+++ b/t/perf/p5310-pack-bitmaps.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+test_description='Tests pack performance using bitmaps'
+. ./perf-lib.sh
+. "${TEST_DIRECTORY}/perf/lib-bitmap.sh"
+
+test_lookup_pack_bitmap () {
+ test_expect_success 'start the test from scratch' '
+ rm -rf * .git
+ '
+
+ test_perf_large_repo
+
+ # note that we do everything through config,
+ # since we want to be able to compare bitmap-aware
+ # git versus non-bitmap git
+ #
+ # We intentionally use the deprecated pack.writebitmaps
+ # config so that we can test against older versions of git.
+ test_expect_success 'setup bitmap config' '
+ git config pack.writebitmaps true
+ '
+
+ # we need to create the tag up front such that it is covered by the repack and
+ # thus by generated bitmaps.
+ test_expect_success 'create tags' '
+ git tag --message="tag pointing to HEAD" perf-tag HEAD
+ '
+
+ test_perf "enable lookup table: $1" '
+ git config pack.writeBitmapLookupTable '"$1"'
+ '
+
+ test_pack_bitmap
+}
+
+test_lookup_pack_bitmap false
+test_lookup_pack_bitmap true
+
+test_done
diff --git a/t/perf/p5311-pack-bitmaps-fetch.sh b/t/perf/p5311-pack-bitmaps-fetch.sh
new file mode 100755
index 0000000..426fab8
--- /dev/null
+++ b/t/perf/p5311-pack-bitmaps-fetch.sh
@@ -0,0 +1,54 @@
+#!/bin/sh
+
+test_description='performance of fetches from bitmapped packs'
+. ./perf-lib.sh
+
+test_fetch_bitmaps () {
+ test_expect_success 'setup test directory' '
+ rm -fr * .git
+ '
+
+ test_perf_default_repo
+
+ test_expect_success 'create bitmapped server repo' '
+ git config pack.writebitmaps true &&
+ git config pack.writeBitmapLookupTable '"$1"' &&
+ git repack -ad
+ '
+
+ # simulate a fetch from a repository that last fetched N days ago, for
+ # various values of N. We do so by following the first-parent chain,
+ # and assume the first entry in the chain that is N days older than the current
+ # HEAD is where the HEAD would have been then.
+ for days in 1 2 4 8 16 32 64 128; do
+ title=$(printf '%10s' "($days days)")
+ test_expect_success "setup revs from $days days ago" '
+ now=$(git log -1 --format=%ct HEAD) &&
+ then=$(($now - ($days * 86400))) &&
+ tip=$(git rev-list -1 --first-parent --until=$then HEAD) &&
+ {
+ echo HEAD &&
+ echo ^$tip
+ } >revs
+ '
+
+ test_perf "server $title (lookup=$1)" '
+ git pack-objects --stdout --revs \
+ --thin --delta-base-offset \
+ <revs >tmp.pack
+ '
+
+ test_size "size $title" '
+ wc -c <tmp.pack
+ '
+
+ test_perf "client $title (lookup=$1)" '
+ git index-pack --stdin --fix-thin <tmp.pack
+ '
+ done
+}
+
+test_fetch_bitmaps true
+test_fetch_bitmaps false
+
+test_done
diff --git a/t/perf/p5312-pack-bitmaps-revs.sh b/t/perf/p5312-pack-bitmaps-revs.sh
new file mode 100755
index 0000000..ceec606
--- /dev/null
+++ b/t/perf/p5312-pack-bitmaps-revs.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+test_description='Tests pack performance using bitmaps (rev index enabled)'
+. ./perf-lib.sh
+. "${TEST_DIRECTORY}/perf/lib-bitmap.sh"
+
+test_lookup_pack_bitmap () {
+ test_expect_success 'start the test from scratch' '
+ rm -rf * .git
+ '
+
+ test_perf_large_repo
+
+ test_expect_success 'setup bitmap config' '
+ git config pack.writebitmaps true
+ '
+
+ # we need to create the tag up front such that it is covered by the repack and
+ # thus by generated bitmaps.
+ test_expect_success 'create tags' '
+ git tag --message="tag pointing to HEAD" perf-tag HEAD
+ '
+
+ test_perf "enable lookup table: $1" '
+ git config pack.writeBitmapLookupTable '"$1"'
+ '
+
+ test_pack_bitmap
+}
+
+test_lookup_pack_bitmap false
+test_lookup_pack_bitmap true
+
+test_done
diff --git a/t/perf/p5326-multi-pack-bitmaps.sh b/t/perf/p5326-multi-pack-bitmaps.sh
new file mode 100755
index 0000000..d082e6c
--- /dev/null
+++ b/t/perf/p5326-multi-pack-bitmaps.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+
+test_description='Tests performance using midx bitmaps'
+. ./perf-lib.sh
+. "${TEST_DIRECTORY}/perf/lib-bitmap.sh"
+
+test_bitmap () {
+ local enabled="$1"
+
+ test_expect_success "remove existing repo (lookup=$enabled)" '
+ rm -fr * .git
+ '
+
+ test_perf_large_repo
+
+ # we need to create the tag up front such that it is covered by the repack and
+ # thus by generated bitmaps.
+ test_expect_success 'create tags' '
+ git tag --message="tag pointing to HEAD" perf-tag HEAD
+ '
+
+ test_expect_success "use lookup table: $enabled" '
+ git config pack.writeBitmapLookupTable '"$enabled"'
+ '
+
+ test_expect_success "start with bitmapped pack (lookup=$enabled)" '
+ git repack -adb
+ '
+
+ test_perf "setup multi-pack index (lookup=$enabled)" '
+ git multi-pack-index write --bitmap
+ '
+
+ test_expect_success "drop pack bitmap (lookup=$enabled)" '
+ rm -f .git/objects/pack/pack-*.bitmap
+ '
+
+ test_full_bitmap
+
+ test_expect_success "create partial bitmap state (lookup=$enabled)" '
+ # pick a commit to represent the repo tip in the past
+ cutoff=$(git rev-list HEAD~100 -1) &&
+ orig_tip=$(git rev-parse HEAD) &&
+
+ # now pretend we have just one tip
+ rm -rf .git/logs .git/refs/* .git/packed-refs &&
+ git update-ref HEAD $cutoff &&
+
+ # and then repack, which will leave us with a nice
+ # big bitmap pack of the "old" history, and all of
+ # the new history will be loose, as if it had been pushed
+ # up incrementally and exploded via unpack-objects
+ git repack -Ad &&
+ git multi-pack-index write --bitmap &&
+
+ # and now restore our original tip, as if the pushes
+ # had happened
+ git update-ref HEAD $orig_tip
+ '
+
+ test_partial_bitmap
+}
+
+test_bitmap false
+test_bitmap true
+
+test_done
diff --git a/t/perf/p5550-fetch-tags.sh b/t/perf/p5550-fetch-tags.sh
new file mode 100755
index 0000000..d0e0e01
--- /dev/null
+++ b/t/perf/p5550-fetch-tags.sh
@@ -0,0 +1,78 @@
+#!/bin/sh
+
+test_description='performance of tag-following with many tags
+
+This tests a fairly pathological case, so rather than rely on a real-world
+case, we will construct our own repository. The situation is roughly as
+follows.
+
+The parent repository has a large number of tags which are disconnected from
+the rest of history. That makes them candidates for tag-following, but we never
+actually grab them (and thus they will impact each subsequent fetch).
+
+The child repository is a clone of parent, without the tags, and is at least
+one commit behind the parent (meaning that we will fetch one object and then
+examine the tags to see if they need followed). Furthermore, it has a large
+number of packs.
+
+The exact values of "large" here are somewhat arbitrary; I picked values that
+start to show a noticeable performance problem on my machine, but without
+taking too long to set up and run the tests.
+'
+. ./perf-lib.sh
+. "$TEST_DIRECTORY/perf/lib-pack.sh"
+
+# make a long nonsense history on branch $1, consisting of $2 commits, each
+# with a unique file pointing to the blob at $2.
+create_history () {
+ perl -le '
+ my ($branch, $n, $blob) = @ARGV;
+ for (1..$n) {
+ print "commit refs/heads/$branch";
+ print "committer nobody <nobody@example.com> now";
+ print "data 4";
+ print "foo";
+ print "M 100644 $blob $_";
+ }
+ ' "$@" |
+ git fast-import --date-format=now
+}
+
+# make a series of tags, one per commit in the revision range given by $@
+create_tags () {
+ git rev-list "$@" |
+ perl -lne 'print "create refs/tags/$. $_"' |
+ git update-ref --stdin
+}
+
+test_expect_success 'create parent and child' '
+ git init parent &&
+ git -C parent commit --allow-empty -m base &&
+ git clone parent child &&
+ git -C parent commit --allow-empty -m trigger-fetch
+'
+
+test_expect_success 'populate parent tags' '
+ (
+ cd parent &&
+ blob=$(echo content | git hash-object -w --stdin) &&
+ create_history cruft 3000 $blob &&
+ create_tags cruft &&
+ git branch -D cruft
+ )
+'
+
+test_expect_success 'create child packs' '
+ (
+ cd child &&
+ setup_many_packs
+ )
+'
+
+test_perf 'fetch' '
+ # make sure there is something to fetch on each iteration
+ git -C child update-ref -d refs/remotes/origin/master &&
+ git -C child fetch
+'
+
+test_done
diff --git a/t/perf/p5551-fetch-rescan.sh b/t/perf/p5551-fetch-rescan.sh
new file mode 100755
index 0000000..b99dc23
--- /dev/null
+++ b/t/perf/p5551-fetch-rescan.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+test_description='fetch performance with many packs
+
+It is common for fetch to consider objects that we might not have, and it is an
+easy mistake for the code to use a function like `parse_object` that might
+give the correct _answer_ on such an object, but do so slowly (due to
+re-scanning the pack directory for lookup failures).
+
+The resulting performance drop can be hard to notice in a real repository, but
+becomes quite large in a repository with a large number of packs. So this
+test creates a more pathological case, since any mistakes would produce a more
+noticeable slowdown.
+'
+. ./perf-lib.sh
+. "$TEST_DIRECTORY"/perf/lib-pack.sh
+
+test_expect_success 'create parent and child' '
+ git init parent &&
+ git clone parent child
+'
+
+
+test_expect_success 'create refs in the parent' '
+ (
+ cd parent &&
+ git commit --allow-empty -m foo &&
+ head=$(git rev-parse HEAD) &&
+ test_seq 1000 |
+ sed "s,.*,update refs/heads/& $head," |
+ $MODERN_GIT update-ref --stdin
+ )
+'
+
+test_expect_success 'create many packs in the child' '
+ (
+ cd child &&
+ setup_many_packs
+ )
+'
+
+test_perf 'fetch' '
+ # start at the same state for each iteration
+ obj=$($MODERN_GIT -C parent rev-parse HEAD) &&
+ (
+ cd child &&
+ $MODERN_GIT for-each-ref --format="delete %(refname)" refs/remotes |
+ $MODERN_GIT update-ref --stdin &&
+ rm -vf .git/objects/$(echo $obj | sed "s|^..|&/|") &&
+
+ git fetch
+ )
+'
+
+test_done
diff --git a/t/perf/p5600-partial-clone.sh b/t/perf/p5600-partial-clone.sh
new file mode 100755
index 0000000..a965f2c
--- /dev/null
+++ b/t/perf/p5600-partial-clone.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+
+test_description='performance of partial clones'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_expect_success 'enable server-side config' '
+ git config uploadpack.allowFilter true &&
+ git config uploadpack.allowAnySHA1InWant true
+'
+
+test_perf 'clone without blobs' '
+ rm -rf bare.git &&
+ git clone --no-local --bare --filter=blob:none . bare.git
+'
+
+test_perf 'checkout of result' '
+ rm -rf worktree &&
+ mkdir -p worktree/.git &&
+ tar -C bare.git -cf - . | tar -C worktree/.git -xf - &&
+ git -C worktree config core.bare false &&
+ git -C worktree checkout -f
+'
+
+test_perf 'fsck' '
+ git -C bare.git fsck
+'
+
+test_perf 'count commits' '
+ git -C bare.git rev-list --all --count
+'
+
+test_perf 'count non-promisor commits' '
+ git -C bare.git rev-list --all --count --exclude-promisor-objects
+'
+
+test_perf 'gc' '
+ git -C bare.git gc
+'
+
+test_done
diff --git a/t/perf/p5601-clone-reference.sh b/t/perf/p5601-clone-reference.sh
new file mode 100755
index 0000000..68fed66
--- /dev/null
+++ b/t/perf/p5601-clone-reference.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+test_description='speed of clone --reference'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+test_expect_success 'create shareable repository' '
+ git clone --bare . shared.git
+'
+
+test_expect_success 'advance base repository' '
+ # Do not use test_commit here; its test_tick will
+ # use some ancient hard-coded date. The resulting clock
+ # skew will cause pack-objects to traverse in a very
+ # sub-optimal order, skewing the results.
+ echo content >new-file-that-does-not-exist &&
+ git add new-file-that-does-not-exist &&
+ git commit -m "new commit"
+'
+
+test_perf 'clone --reference' '
+ rm -rf dst.git &&
+ git clone --no-local --bare --reference shared.git . dst.git
+'
+
+test_done
diff --git a/t/perf/p7000-filter-branch.sh b/t/perf/p7000-filter-branch.sh
new file mode 100755
index 0000000..b029586
--- /dev/null
+++ b/t/perf/p7000-filter-branch.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+test_description='performance of filter-branch'
+. ./perf-lib.sh
+
+test_perf_default_repo
+test_checkout_worktree
+
+test_expect_success 'mark bases for tests' '
+ git tag -f tip &&
+ git tag -f base HEAD~100
+'
+
+test_perf 'noop filter' '
+ git checkout --detach tip &&
+ git filter-branch -f base..HEAD
+'
+
+test_perf 'noop prune-empty' '
+ git checkout --detach tip &&
+ git filter-branch -f --prune-empty base..HEAD
+'
+
+test_done
diff --git a/t/perf/p7102-reset.sh b/t/perf/p7102-reset.sh
new file mode 100755
index 0000000..9b039e8
--- /dev/null
+++ b/t/perf/p7102-reset.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+test_description='performance of reset'
+. ./perf-lib.sh
+
+test_perf_default_repo
+test_checkout_worktree
+
+test_perf 'reset --hard with change in tree' '
+ base=$(git rev-parse HEAD) &&
+ test_commit --no-tag A &&
+ new=$(git rev-parse HEAD) &&
+
+ for i in $(test_seq 10)
+ do
+ git reset --hard $new &&
+ git reset --hard $base || return $?
+ done
+'
+
+test_done
diff --git a/t/perf/p7300-clean.sh b/t/perf/p7300-clean.sh
new file mode 100755
index 0000000..7c1888a
--- /dev/null
+++ b/t/perf/p7300-clean.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+test_description="Test git-clean performance"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+test_checkout_worktree
+
+test_expect_success 'setup untracked directory with many sub dirs' '
+ rm -rf 500_sub_dirs 100000_sub_dirs clean_test_dir &&
+ mkdir 500_sub_dirs 100000_sub_dirs clean_test_dir &&
+ for i in $(test_seq 1 500)
+ do
+ mkdir 500_sub_dirs/dir$i || return $?
+ done &&
+ for i in $(test_seq 1 200)
+ do
+ cp -r 500_sub_dirs 100000_sub_dirs/dir$i || return $?
+ done
+'
+
+test_perf 'clean many untracked sub dirs, check for nested git' '
+ git clean -n -q -f -d 100000_sub_dirs/
+'
+
+test_perf 'clean many untracked sub dirs, ignore nested git' '
+ git clean -n -q -f -f -d 100000_sub_dirs/
+'
+
+test_perf 'ls-files -o' '
+ git ls-files -o
+'
+
+test_done
diff --git a/t/perf/p7519-fsmonitor.sh b/t/perf/p7519-fsmonitor.sh
new file mode 100755
index 0000000..b1cb238
--- /dev/null
+++ b/t/perf/p7519-fsmonitor.sh
@@ -0,0 +1,314 @@
+#!/bin/sh
+
+test_description="Test core.fsmonitor"
+
+. ./perf-lib.sh
+
+#
+# Performance test for the fsmonitor feature which enables git to talk to a
+# file system change monitor and avoid having to scan the working directory
+# for new or modified files.
+#
+# By default, the performance test will utilize the Watchman file system
+# monitor if it is installed. If Watchman is not installed, it will use a
+# dummy integration script that does not report any new or modified files.
+# The dummy script has very little overhead which provides optimistic results.
+#
+# The performance test will also use the untracked cache feature if it is
+# available as fsmonitor uses it to speed up scanning for untracked files.
+#
+# There are 3 environment variables that can be used to alter the default
+# behavior of the performance test:
+#
+# GIT_PERF_7519_UNTRACKED_CACHE: used to configure core.untrackedCache
+# GIT_PERF_7519_SPLIT_INDEX: used to configure core.splitIndex
+# GIT_PERF_7519_FSMONITOR: used to configure core.fsMonitor. May be an
+# absolute path to an integration. May be a space delimited list of
+# absolute paths to integrations.
+#
+# The big win for using fsmonitor is the elimination of the need to scan the
+# working directory looking for changed and untracked files. If the file
+# information is all cached in RAM, the benefits are reduced.
+#
+# GIT_PERF_7519_DROP_CACHE: if set, the OS caches are dropped between tests
+#
+# GIT_PERF_7519_TRACE: if set, enable trace logging during the test.
+# Trace logs will be grouped by fsmonitor provider.
+
+test_perf_large_repo
+test_checkout_worktree
+
+test_lazy_prereq UNTRACKED_CACHE '
+ { git update-index --test-untracked-cache; ret=$?; } &&
+ test $ret -ne 1
+'
+
+test_lazy_prereq WATCHMAN '
+ command -v watchman
+'
+
+if test_have_prereq WATCHMAN
+then
+ # Convert unix style paths to escaped Windows style paths for Watchman
+ case "$(uname -s)" in
+ MSYS_NT*)
+ GIT_WORK_TREE="$(cygpath -aw "$PWD" | sed 's,\\,/,g')"
+ ;;
+ *)
+ GIT_WORK_TREE="$PWD"
+ ;;
+ esac
+fi
+
+trace_start () {
+ if test -n "$GIT_PERF_7519_TRACE"
+ then
+ name="$1"
+ TEST_TRACE_DIR="$TEST_OUTPUT_DIRECTORY/test-trace/p7519/"
+ echo "Writing trace logging to $TEST_TRACE_DIR"
+
+ mkdir -p "$TEST_TRACE_DIR"
+
+ # Start Trace2 logging and any other GIT_TRACE_* logs that you
+ # want for this named test case.
+
+ GIT_TRACE2_PERF="$TEST_TRACE_DIR/$name.trace2perf"
+ export GIT_TRACE2_PERF
+
+ >"$GIT_TRACE2_PERF"
+ fi
+}
+
+trace_stop () {
+ if test -n "$GIT_PERF_7519_TRACE"
+ then
+ unset GIT_TRACE2_PERF
+ fi
+}
+
+touch_files () {
+ n=$1 &&
+ d="$n"_files &&
+
+ (cd $d && test_seq 1 $n | xargs touch )
+}
+
+test_expect_success "one time repo setup" '
+ # set untrackedCache depending on the environment
+ if test -n "$GIT_PERF_7519_UNTRACKED_CACHE"
+ then
+ git config core.untrackedCache "$GIT_PERF_7519_UNTRACKED_CACHE"
+ else
+ if test_have_prereq UNTRACKED_CACHE
+ then
+ git config core.untrackedCache true
+ else
+ git config core.untrackedCache false
+ fi
+ fi &&
+
+ # set core.splitindex depending on the environment
+ if test -n "$GIT_PERF_7519_SPLIT_INDEX"
+ then
+ git config core.splitIndex "$GIT_PERF_7519_SPLIT_INDEX"
+ fi &&
+
+ mkdir 1_file 10_files 100_files 1000_files 10000_files &&
+ : 1_file directory should be left empty &&
+ touch_files 10 &&
+ touch_files 100 &&
+ touch_files 1000 &&
+ touch_files 10000 &&
+ git add 1_file 10_files 100_files 1000_files 10000_files &&
+ git commit -qm "Add files" &&
+
+ # If Watchman exists, watch the work tree and attempt a query.
+ if test_have_prereq WATCHMAN; then
+ watchman watch "$GIT_WORK_TREE" &&
+ watchman watch-list | grep -q -F "p7519-fsmonitor"
+ fi
+'
+
+setup_for_fsmonitor_hook () {
+ # set INTEGRATION_SCRIPT depending on the environment
+ if test -n "$INTEGRATION_PATH"
+ then
+ INTEGRATION_SCRIPT="$INTEGRATION_PATH"
+ else
+ #
+ # Choose integration script based on existence of Watchman.
+ # Fall back to an empty integration script.
+ #
+ mkdir .git/hooks &&
+ if test_have_prereq WATCHMAN
+ then
+ INTEGRATION_SCRIPT=".git/hooks/fsmonitor-watchman" &&
+ cp "$TEST_DIRECTORY/../templates/hooks--fsmonitor-watchman.sample" "$INTEGRATION_SCRIPT"
+ else
+ INTEGRATION_SCRIPT=".git/hooks/fsmonitor-empty" &&
+ write_script "$INTEGRATION_SCRIPT"<<-\EOF
+ EOF
+ fi
+ fi &&
+
+ git config core.fsmonitor "$INTEGRATION_SCRIPT" &&
+ git update-index --fsmonitor 2>error &&
+ if test_have_prereq WATCHMAN
+ then
+ test_must_be_empty error # ensure no silent error
+ else
+ grep "Empty last update token" error
+ fi
+}
+
+test_perf_w_drop_caches () {
+ if test -n "$GIT_PERF_7519_DROP_CACHE"; then
+ test_perf "$1" --setup "test-tool drop-caches" "$2"
+ else
+ test_perf "$@"
+ fi
+}
+
+test_fsmonitor_suite () {
+ if test -n "$USE_FSMONITOR_DAEMON"
+ then
+ DESC="builtin fsmonitor--daemon"
+ elif test -n "$INTEGRATION_SCRIPT"
+ then
+ DESC="fsmonitor=$(basename $INTEGRATION_SCRIPT)"
+ else
+ DESC="fsmonitor=disabled"
+ fi
+
+ test_expect_success "test_initialization" '
+ git reset --hard &&
+ git status # Warm caches
+ '
+
+ test_perf_w_drop_caches "status ($DESC)" '
+ git status
+ '
+
+ test_perf_w_drop_caches "status -uno ($DESC)" '
+ git status -uno
+ '
+
+ test_perf_w_drop_caches "status -uall ($DESC)" '
+ git status -uall
+ '
+
+ # Update the mtimes on upto 100k files to make status think
+ # that they are dirty. For simplicity, omit any files with
+ # LFs (i.e. anything that ls-files thinks it needs to dquote)
+ # and any files with whitespace so that they pass thru xargs
+ # properly.
+ #
+ test_perf_w_drop_caches "status (dirty) ($DESC)" '
+ git ls-files | \
+ head -100000 | \
+ grep -v \" | \
+ grep -v " ." | \
+ xargs test-tool chmtime -300 &&
+ git status
+ '
+
+ test_perf_w_drop_caches "diff ($DESC)" '
+ git diff
+ '
+
+ test_perf_w_drop_caches "diff HEAD ($DESC)" '
+ git diff HEAD
+ '
+
+ test_perf_w_drop_caches "diff -- 0_files ($DESC)" '
+ git diff -- 1_file
+ '
+
+ test_perf_w_drop_caches "diff -- 10_files ($DESC)" '
+ git diff -- 10_files
+ '
+
+ test_perf_w_drop_caches "diff -- 100_files ($DESC)" '
+ git diff -- 100_files
+ '
+
+ test_perf_w_drop_caches "diff -- 1000_files ($DESC)" '
+ git diff -- 1000_files
+ '
+
+ test_perf_w_drop_caches "diff -- 10000_files ($DESC)" '
+ git diff -- 10000_files
+ '
+
+ test_perf_w_drop_caches "add ($DESC)" '
+ git add --all
+ '
+}
+
+#
+# Run a full set of perf tests using each Hook-based fsmonitor provider,
+# such as Watchman.
+#
+
+trace_start fsmonitor-watchman
+if test -n "$GIT_PERF_7519_FSMONITOR"; then
+ for INTEGRATION_PATH in $GIT_PERF_7519_FSMONITOR; do
+ test_expect_success "setup for fsmonitor $INTEGRATION_PATH" 'setup_for_fsmonitor_hook'
+ test_fsmonitor_suite
+ done
+else
+ test_expect_success "setup for fsmonitor hook" 'setup_for_fsmonitor_hook'
+ test_fsmonitor_suite
+fi
+
+if test_have_prereq WATCHMAN
+then
+ watchman watch-del "$GIT_WORK_TREE" >/dev/null 2>&1 &&
+
+ # Work around Watchman bug on Windows where it holds on to handles
+ # preventing the removal of the trash directory
+ watchman shutdown-server >/dev/null 2>&1
+fi
+trace_stop
+
+#
+# Run a full set of perf tests with the fsmonitor feature disabled.
+#
+
+trace_start fsmonitor-disabled
+test_expect_success "setup without fsmonitor" '
+ unset INTEGRATION_SCRIPT &&
+ git config --unset core.fsmonitor &&
+ git update-index --no-fsmonitor
+'
+
+test_fsmonitor_suite
+trace_stop
+
+#
+# Run a full set of perf tests using the built-in fsmonitor--daemon.
+# It does not use the Hook API, so it has a different setup.
+# Explicitly start the daemon here and before we start client commands
+# so that we can later add custom tracing.
+#
+if test_have_prereq FSMONITOR_DAEMON
+then
+ USE_FSMONITOR_DAEMON=t
+
+ test_expect_success "setup for builtin fsmonitor" '
+ trace_start fsmonitor--daemon--server &&
+ git fsmonitor--daemon start &&
+
+ trace_start fsmonitor--daemon--client &&
+
+ git config core.fsmonitor true &&
+ git update-index --fsmonitor
+ '
+
+ test_fsmonitor_suite
+
+ git fsmonitor--daemon stop
+ trace_stop
+fi
+
+test_done
diff --git a/t/perf/p7527-builtin-fsmonitor.sh b/t/perf/p7527-builtin-fsmonitor.sh
new file mode 100755
index 0000000..c3f9a4c
--- /dev/null
+++ b/t/perf/p7527-builtin-fsmonitor.sh
@@ -0,0 +1,257 @@
+#!/bin/sh
+
+test_description="Perf test for the builtin FSMonitor"
+
+. ./perf-lib.sh
+
+if ! test_have_prereq FSMONITOR_DAEMON
+then
+ skip_all="fsmonitor--daemon is not supported on this platform"
+ test_done
+fi
+
+test_lazy_prereq UNTRACKED_CACHE '
+ { git update-index --test-untracked-cache; ret=$?; } &&
+ test $ret -ne 1
+'
+
+# Lie to perf-lib and ask for a new empty repo and avoid
+# the complaints about GIT_PERF_REPO not being big enough
+# the perf hit when GIT_PERF_LARGE_REPO is copied into
+# the trash directory.
+#
+# NEEDSWORK: It would be nice if perf-lib had an option to
+# "borrow" an existing large repo (especially for gigantic
+# monorepos) and use it in-place. For now, fake it here.
+#
+test_perf_fresh_repo
+
+
+# Use a generated synthetic monorepo. If it doesn't exist, we will
+# generate it. If it does exist, we will put it in a known state
+# before we start our timings.
+#
+PARAM_D=5
+PARAM_W=10
+PARAM_F=9
+
+PARAMS="$PARAM_D"."$PARAM_W"."$PARAM_F"
+
+BALLAST_BR=p0006-ballast
+export BALLAST_BR
+
+TMP_BR=tmp_br
+export TMP_BR
+
+REPO=../repos/gen-many-files-"$PARAMS".git
+export REPO
+
+if ! test -d $REPO
+then
+ (cd ../repos; ./many-files.sh -d $PARAM_D -w $PARAM_W -f $PARAM_F)
+fi
+
+
+enable_uc () {
+ git -C $REPO config core.untrackedcache true
+ git -C $REPO update-index --untracked-cache
+ git -C $REPO status >/dev/null 2>&1
+}
+
+disable_uc () {
+ git -C $REPO config core.untrackedcache false
+ git -C $REPO update-index --no-untracked-cache
+ git -C $REPO status >/dev/null 2>&1
+}
+
+start_fsm () {
+ git -C $REPO fsmonitor--daemon start
+ git -C $REPO fsmonitor--daemon status
+ git -C $REPO config core.fsmonitor true
+ git -C $REPO update-index --fsmonitor
+ git -C $REPO status >/dev/null 2>&1
+}
+
+stop_fsm () {
+ git -C $REPO config --unset core.fsmonitor
+ git -C $REPO update-index --no-fsmonitor
+ test_might_fail git -C $REPO fsmonitor--daemon stop 2>/dev/null
+ git -C $REPO status >/dev/null 2>&1
+}
+
+
+# Ensure that FSMonitor is turned off on the borrowed repo.
+#
+test_expect_success "Setup borrowed repo (fsm+uc)" "
+ stop_fsm &&
+ disable_uc
+"
+
+# Also ensure that it starts in a known state.
+#
+# Because we assume that $GIT_PERF_REPEAT_COUNT > 1, we are not going to time
+# the ballast checkout, since only the first invocation does any work and the
+# subsequent ones just print "already on branch" and quit, so the reported
+# time is not useful.
+#
+# Create a temp branch and do all work relative to it so that we don't
+# accidentially alter the real ballast branch.
+#
+test_expect_success "Setup borrowed repo (temp ballast branch)" "
+ test_might_fail git -C $REPO checkout $BALLAST_BR &&
+ test_might_fail git -C $REPO reset --hard &&
+ git -C $REPO clean -d -f &&
+ test_might_fail git -C $REPO branch -D $TMP_BR &&
+ git -C $REPO branch $TMP_BR $BALLAST_BR &&
+ git -C $REPO checkout $TMP_BR
+"
+
+
+echo Data >data.txt
+
+# NEEDSWORK: We assume that $GIT_PERF_REPEAT_COUNT > 1. With
+# FSMonitor enabled, we can get a skewed view of status times, since
+# the index MAY (or may not) be updated after the first invocation
+# which will update the FSMonitor Token, so the subsequent invocations
+# may get a smaller response from the daemon.
+#
+do_status () {
+ msg=$1
+
+ test_perf "$msg" "
+ git -C $REPO status >/dev/null 2>&1
+ "
+}
+
+do_matrix () {
+ uc=$1
+ fsm=$2
+
+ t="[uc $uc][fsm $fsm]"
+ MATRIX_BR="$TMP_BR-$uc-$fsm"
+
+ test_expect_success "$t Setup matrix branch" "
+ git -C $REPO clean -d -f &&
+ git -C $REPO checkout $TMP_BR &&
+ test_might_fail git -C $REPO branch -D $MATRIX_BR &&
+ git -C $REPO branch $MATRIX_BR $TMP_BR &&
+ git -C $REPO checkout $MATRIX_BR
+ "
+
+ if test $uc = true
+ then
+ enable_uc
+ else
+ disable_uc
+ fi
+
+ if test $fsm = true
+ then
+ start_fsm
+ else
+ stop_fsm
+ fi
+
+ do_status "$t status after checkout"
+
+ # Modify many files in the matrix branch.
+ # Stage them.
+ # Commit them.
+ # Rollback.
+ #
+ test_expect_success "$t modify tracked files" "
+ find $REPO -name file1 -exec cp data.txt {} \\;
+ "
+
+ do_status "$t status after big change"
+
+ # Don't bother timing the "add" because _REPEAT_COUNT
+ # issue described above.
+ #
+ test_expect_success "$t add all" "
+ git -C $REPO add -A
+ "
+
+ do_status "$t status after add all"
+
+ test_expect_success "$t add dot" "
+ git -C $REPO add .
+ "
+
+ do_status "$t status after add dot"
+
+ test_expect_success "$t commit staged" "
+ git -C $REPO commit -a -m data
+ "
+
+ do_status "$t status after commit"
+
+ test_expect_success "$t reset HEAD~1 hard" "
+ git -C $REPO reset --hard HEAD~1 >/dev/null 2>&1
+ "
+
+ do_status "$t status after reset hard"
+
+ # Create some untracked files.
+ #
+ test_expect_success "$t create untracked files" "
+ cp -R $REPO/ballast/dir1 $REPO/ballast/xxx1
+ "
+
+ do_status "$t status after create untracked files"
+
+ # Remove the new untracked files.
+ #
+ test_expect_success "$t clean -df" "
+ git -C $REPO clean -d -f
+ "
+
+ do_status "$t status after clean"
+
+ if test $fsm = true
+ then
+ stop_fsm
+ fi
+}
+
+# Begin testing each case in the matrix that we care about.
+#
+uc_values="false"
+test_have_prereq UNTRACKED_CACHE && uc_values="false true"
+
+fsm_values="false true"
+
+for uc_val in $uc_values
+do
+ for fsm_val in $fsm_values
+ do
+ do_matrix $uc_val $fsm_val
+ done
+done
+
+cleanup () {
+ uc=$1
+ fsm=$2
+
+ MATRIX_BR="$TMP_BR-$uc-$fsm"
+
+ test_might_fail git -C $REPO branch -D $MATRIX_BR
+}
+
+
+# We're borrowing this repo. We should leave it in a clean state.
+#
+test_expect_success "Cleanup temp and matrix branches" "
+ git -C $REPO clean -d -f &&
+ test_might_fail git -C $REPO checkout $BALLAST_BR &&
+ test_might_fail git -C $REPO branch -D $TMP_BR &&
+ for uc_val in $uc_values
+ do
+ for fsm_val in $fsm_values
+ do
+ cleanup $uc_val $fsm_val || return 1
+ done
+ done
+"
+
+test_done
diff --git a/t/perf/p7810-grep.sh b/t/perf/p7810-grep.sh
new file mode 100755
index 0000000..9f4ade6
--- /dev/null
+++ b/t/perf/p7810-grep.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+test_description="git-grep performance in various modes"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+test_perf 'grep worktree, cheap regex' '
+ git grep some_nonexistent_string || :
+'
+test_perf 'grep worktree, expensive regex' '
+ git grep "^.* *some_nonexistent_string$" || :
+'
+test_perf 'grep --cached, cheap regex' '
+ git grep --cached some_nonexistent_string || :
+'
+test_perf 'grep --cached, expensive regex' '
+ git grep --cached "^.* *some_nonexistent_string$" || :
+'
+
+test_done
diff --git a/t/perf/p7820-grep-engines.sh b/t/perf/p7820-grep-engines.sh
new file mode 100755
index 0000000..9bfb868
--- /dev/null
+++ b/t/perf/p7820-grep-engines.sh
@@ -0,0 +1,90 @@
+#!/bin/sh
+
+test_description="Comparison of git-grep's regex engines
+
+Set GIT_PERF_7820_GREP_OPTS in the environment to pass options to
+git-grep. Make sure to include a leading space,
+e.g. GIT_PERF_7820_GREP_OPTS=' -i'. Some options to try:
+
+ -i
+ -w
+ -v
+ -vi
+ -vw
+ -viw
+
+If GIT_PERF_GREP_THREADS is set to a list of threads (e.g. '1 4 8'
+etc.) we will test the patterns under those numbers of threads.
+"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+if test -n "$GIT_PERF_GREP_THREADS"
+then
+ test_set_prereq PERF_GREP_ENGINES_THREADS
+fi
+
+for pattern in \
+ 'how.to' \
+ '^how to' \
+ '[how] to' \
+ '\(e.t[^ ]*\|v.ry\) rare' \
+ 'm\(ú\|u\)lt.b\(æ\|y\)te'
+do
+ for engine in basic extended perl
+ do
+ if test $engine != "basic"
+ then
+ # Poor man's basic -> extended converter.
+ pattern=$(echo "$pattern" | sed 's/\\//g')
+ fi
+ if test $engine = "perl" && ! test_have_prereq PCRE
+ then
+ prereq="PCRE"
+ else
+ prereq=""
+ fi
+ if ! test_have_prereq PERF_GREP_ENGINES_THREADS
+ then
+ test_perf "$engine grep$GIT_PERF_7820_GREP_OPTS '$pattern'" \
+ --prereq "$prereq" "
+ git -c grep.patternType=$engine grep$GIT_PERF_7820_GREP_OPTS -- '$pattern' >'out.$engine' || :
+ "
+ else
+ for threads in $GIT_PERF_GREP_THREADS
+ do
+ test_perf "$engine grep$GIT_PERF_7820_GREP_OPTS '$pattern' with $threads threads"
+ --prereq PTHREADS,$prereq "
+ git -c grep.patternType=$engine -c grep.threads=$threads grep$GIT_PERF_7820_GREP_OPTS -- '$pattern' >'out.$engine.$threads' || :
+ "
+ done
+ fi
+ done
+
+ if ! test_have_prereq PERF_GREP_ENGINES_THREADS
+ then
+ test_expect_success "assert that all engines found the same for$GIT_PERF_7820_GREP_OPTS '$pattern'" '
+ test_cmp out.basic out.extended &&
+ if test_have_prereq PCRE
+ then
+ test_cmp out.basic out.perl
+ fi
+ '
+ else
+ for threads in $GIT_PERF_GREP_THREADS
+ do
+ test_expect_success PTHREADS "assert that all engines found the same for$GIT_PERF_7820_GREP_OPTS '$pattern' under threading" "
+ test_cmp out.basic.$threads out.extended.$threads &&
+ if test_have_prereq PCRE
+ then
+ test_cmp out.basic.$threads out.perl.$threads
+ fi
+ "
+ done
+ fi
+done
+
+test_done
diff --git a/t/perf/p7821-grep-engines-fixed.sh b/t/perf/p7821-grep-engines-fixed.sh
new file mode 100755
index 0000000..61e41b8
--- /dev/null
+++ b/t/perf/p7821-grep-engines-fixed.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+
+test_description="Comparison of git-grep's regex engines with -F
+
+Set GIT_PERF_7821_GREP_OPTS in the environment to pass options to
+git-grep. Make sure to include a leading space,
+e.g. GIT_PERF_7821_GREP_OPTS=' -w'. See p7820-grep-engines.sh for more
+options to try.
+
+If GIT_PERF_7821_THREADS is set to a list of threads (e.g. '1 4 8'
+etc.) we will test the patterns under those numbers of threads.
+"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+if test -n "$GIT_PERF_GREP_THREADS"
+then
+ test_set_prereq PERF_GREP_ENGINES_THREADS
+fi
+
+for pattern in 'int' 'uncommon' 'æ'
+do
+ for engine in fixed basic extended perl
+ do
+ if test $engine = "perl" && ! test_have_prereq PCRE
+ then
+ prereq="PCRE"
+ else
+ prereq=""
+ fi
+ if ! test_have_prereq PERF_GREP_ENGINES_THREADS
+ then
+ test_perf $prereq "$engine grep$GIT_PERF_7821_GREP_OPTS $pattern" "
+ git -c grep.patternType=$engine grep$GIT_PERF_7821_GREP_OPTS $pattern >'out.$engine' || :
+ "
+ else
+ for threads in $GIT_PERF_GREP_THREADS
+ do
+ test_perf PTHREADS,$prereq "$engine grep$GIT_PERF_7821_GREP_OPTS $pattern with $threads threads" "
+ git -c grep.patternType=$engine -c grep.threads=$threads grep$GIT_PERF_7821_GREP_OPTS $pattern >'out.$engine.$threads' || :
+ "
+ done
+ fi
+ done
+
+ if ! test_have_prereq PERF_GREP_ENGINES_THREADS
+ then
+ test_expect_success "assert that all engines found the same for$GIT_PERF_7821_GREP_OPTS $pattern" '
+ test_cmp out.fixed out.basic &&
+ test_cmp out.fixed out.extended &&
+ if test_have_prereq PCRE
+ then
+ test_cmp out.fixed out.perl
+ fi
+ '
+ else
+ for threads in $GIT_PERF_GREP_THREADS
+ do
+ test_expect_success PTHREADS "assert that all engines found the same for$GIT_PERF_7821_GREP_OPTS $pattern under threading" "
+ test_cmp out.fixed.$threads out.basic.$threads &&
+ test_cmp out.fixed.$threads out.extended.$threads &&
+ if test_have_prereq PCRE
+ then
+ test_cmp out.fixed.$threads out.perl.$threads
+ fi
+ "
+ done
+ fi
+done
+
+test_done
diff --git a/t/perf/p7822-grep-perl-character.sh b/t/perf/p7822-grep-perl-character.sh
new file mode 100755
index 0000000..87009c6
--- /dev/null
+++ b/t/perf/p7822-grep-perl-character.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+
+test_description="git-grep's perl regex
+
+If GIT_PERF_GREP_THREADS is set to a list of threads (e.g. '1 4 8'
+etc.) we will test the patterns under those numbers of threads.
+"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+if test -n "$GIT_PERF_GREP_THREADS"
+then
+ test_set_prereq PERF_GREP_ENGINES_THREADS
+fi
+
+for pattern in \
+ '\\bhow' \
+ '\\bÆvar' \
+ '\\d+ \\bÆvar' \
+ '\\bBelón\\b' \
+ '\\w{12}\\b'
+do
+ echo '$pattern' >pat
+ if ! test_have_prereq PERF_GREP_ENGINES_THREADS
+ then
+ test_perf "grep -P '$pattern'" --prereq PCRE "
+ git -P grep -f pat || :
+ "
+ else
+ for threads in $GIT_PERF_GREP_THREADS
+ do
+ test_perf "grep -P '$pattern' with $threads threads" --prereq PTHREADS,PCRE "
+ git -c grep.threads=$threads -P grep -f pat || :
+ "
+ done
+ fi
+done
+
+test_done
diff --git a/t/perf/p9210-scalar.sh b/t/perf/p9210-scalar.sh
new file mode 100755
index 0000000..265f7cd
--- /dev/null
+++ b/t/perf/p9210-scalar.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+test_description='test scalar performance'
+. ./perf-lib.sh
+
+test_perf_large_repo "$TRASH_DIRECTORY/to-clone"
+
+test_expect_success 'enable server-side partial clone' '
+ git -C to-clone config uploadpack.allowFilter true &&
+ git -C to-clone config uploadpack.allowAnySHA1InWant true
+'
+
+test_perf 'scalar clone' '
+ rm -rf scalar-clone &&
+ scalar clone "file://$(pwd)/to-clone" scalar-clone
+'
+
+test_perf 'git clone' '
+ rm -rf git-clone &&
+ git clone "file://$(pwd)/to-clone" git-clone
+'
+
+test_compare_perf () {
+ command=$1
+ shift
+ args=$*
+ test_perf "$command $args (scalar)" "
+ $command -C scalar-clone/src $args
+ "
+
+ test_perf "$command $args (non-scalar)" "
+ $command -C git-clone $args
+ "
+}
+
+test_compare_perf git status
+test_compare_perf test_commit --append --no-tag A
+
+test_done
diff --git a/t/perf/p9300-fast-import-export.sh b/t/perf/p9300-fast-import-export.sh
new file mode 100755
index 0000000..586161e
--- /dev/null
+++ b/t/perf/p9300-fast-import-export.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+test_description='test fast-import and fast-export performance'
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# Use --no-data here to produce a vastly smaller export file.
+# This is much cheaper to work with but should still exercise
+# fast-import pretty well (we'll still process all commits and
+# trees, which account for 60% or more of objects in most repos).
+#
+# Use --reencode to avoid the default of aborting on non-utf8 commits,
+# which lets this test run against a wider variety of sample repos.
+test_perf 'export (no-blobs)' '
+ git fast-export --reencode=yes --no-data HEAD >export
+'
+
+test_perf 'import (no-blobs)' '
+ git fast-import --force <export
+'
+
+test_done
diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
new file mode 100644
index 0000000..e778677
--- /dev/null
+++ b/t/perf/perf-lib.sh
@@ -0,0 +1,334 @@
+# Performance testing framework. Each perf script starts much like
+# a normal test script, except it sources this library instead of
+# test-lib.sh. See t/perf/README for documentation.
+#
+# Copyright (c) 2011 Thomas Rast
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see http://www.gnu.org/licenses/ .
+
+# These variables must be set before the inclusion of test-lib.sh below,
+# because it will change our working directory.
+TEST_DIRECTORY=$(pwd)/..
+TEST_OUTPUT_DIRECTORY=$(pwd)
+
+TEST_NO_CREATE_REPO=t
+TEST_NO_MALLOC_CHECK=t
+
+. ../test-lib.sh
+
+unset GIT_CONFIG_NOSYSTEM
+GIT_CONFIG_SYSTEM="$TEST_DIRECTORY/perf/config"
+export GIT_CONFIG_SYSTEM
+
+if test -n "$GIT_TEST_INSTALLED" -a -z "$PERF_SET_GIT_TEST_INSTALLED"
+then
+ error "Do not use GIT_TEST_INSTALLED with the perf tests.
+
+Instead use:
+
+ ./run <path-to-git> -- <tests>
+
+See t/perf/README for details."
+fi
+
+# Variables from test-lib that are normally internal to the tests; we
+# need to export them for test_perf subshells
+export TEST_DIRECTORY TRASH_DIRECTORY GIT_BUILD_DIR GIT_TEST_CMP
+
+MODERN_GIT=$GIT_BUILD_DIR/bin-wrappers/git
+export MODERN_GIT
+
+MODERN_SCALAR=$GIT_BUILD_DIR/bin-wrappers/scalar
+export MODERN_SCALAR
+
+perf_results_dir=$TEST_RESULTS_DIR
+test -n "$GIT_PERF_SUBSECTION" && perf_results_dir="$perf_results_dir/$GIT_PERF_SUBSECTION"
+mkdir -p "$perf_results_dir"
+rm -f "$perf_results_dir"/$(basename "$0" .sh).subtests
+
+die_if_build_dir_not_repo () {
+ if ! ( cd "$TEST_DIRECTORY/.." &&
+ git rev-parse --build-dir >/dev/null 2>&1 ); then
+ error "No $1 defined, and your build directory is not a repo"
+ fi
+}
+
+if test -z "$GIT_PERF_REPO"; then
+ die_if_build_dir_not_repo '$GIT_PERF_REPO'
+ GIT_PERF_REPO=$TEST_DIRECTORY/..
+fi
+if test -z "$GIT_PERF_LARGE_REPO"; then
+ die_if_build_dir_not_repo '$GIT_PERF_LARGE_REPO'
+ GIT_PERF_LARGE_REPO=$TEST_DIRECTORY/..
+fi
+
+test_perf_do_repo_symlink_config_ () {
+ test_have_prereq SYMLINKS || git config core.symlinks false
+}
+
+test_perf_copy_repo_contents () {
+ for stuff in "$1"/*
+ do
+ case "$stuff" in
+ */objects|*/hooks|*/config|*/commondir|*/gitdir|*/worktrees|*/fsmonitor--daemon*)
+ ;;
+ *)
+ cp -R "$stuff" "$repo/.git/" || exit 1
+ ;;
+ esac
+ done
+}
+
+test_perf_create_repo_from () {
+ test "$#" = 2 ||
+ BUG "not 2 parameters to test-create-repo"
+ repo="$1"
+ source="$2"
+ source_git="$("$MODERN_GIT" -C "$source" rev-parse --git-dir)"
+ objects_dir="$("$MODERN_GIT" -C "$source" rev-parse --git-path objects)"
+ common_dir="$("$MODERN_GIT" -C "$source" rev-parse --git-common-dir)"
+ mkdir -p "$repo/.git"
+ (
+ cd "$source" &&
+ { cp -Rl "$objects_dir" "$repo/.git/" 2>/dev/null ||
+ cp -R "$objects_dir" "$repo/.git/"; } &&
+
+ # common_dir must come first here, since we want source_git to
+ # take precedence and overwrite any overlapping files
+ test_perf_copy_repo_contents "$common_dir"
+ if test "$source_git" != "$common_dir"
+ then
+ test_perf_copy_repo_contents "$source_git"
+ fi
+ ) &&
+ (
+ cd "$repo" &&
+ "$MODERN_GIT" init -q &&
+ test_perf_do_repo_symlink_config_ &&
+ mv .git/hooks .git/hooks-disabled 2>/dev/null &&
+ if test -f .git/index.lock
+ then
+ # We may be copying a repo that can't run "git
+ # status" due to a locked index. Since we have
+ # a copy it's fine to remove the lock.
+ rm .git/index.lock
+ fi &&
+ if test_bool_env GIT_PERF_USE_SCALAR false
+ then
+ "$MODERN_SCALAR" register
+ fi
+ ) || error "failed to copy repository '$source' to '$repo'"
+}
+
+# call at least one of these to establish an appropriately-sized repository
+test_perf_fresh_repo () {
+ repo="${1:-$TRASH_DIRECTORY}"
+ "$MODERN_GIT" init -q "$repo" &&
+ (
+ cd "$repo" &&
+ test_perf_do_repo_symlink_config_ &&
+ if test_bool_env GIT_PERF_USE_SCALAR false
+ then
+ "$MODERN_SCALAR" register
+ fi
+ )
+}
+
+test_perf_default_repo () {
+ test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_REPO"
+}
+test_perf_large_repo () {
+ if test "$GIT_PERF_LARGE_REPO" = "$GIT_BUILD_DIR"; then
+ echo "warning: \$GIT_PERF_LARGE_REPO is \$GIT_BUILD_DIR." >&2
+ echo "warning: This will work, but may not be a sufficiently large repo" >&2
+ echo "warning: for representative measurements." >&2
+ fi
+ test_perf_create_repo_from "${1:-$TRASH_DIRECTORY}" "$GIT_PERF_LARGE_REPO"
+}
+test_checkout_worktree () {
+ git checkout-index -u -a ||
+ error "git checkout-index failed"
+}
+
+# Performance tests should never fail. If they do, stop immediately
+immediate=t
+
+# Perf tests require GNU time
+case "$(uname -s)" in Darwin) GTIME="${GTIME:-gtime}";; esac
+GTIME="${GTIME:-/usr/bin/time}"
+
+test_run_perf_ () {
+ test_cleanup=:
+ test_export_="test_cleanup"
+ export test_cleanup test_export_
+ "$GTIME" -f "%E %U %S" -o test_time.$i "$TEST_SHELL_PATH" -c '
+. '"$TEST_DIRECTORY"/test-lib-functions.sh'
+test_export () {
+ test_export_="$test_export_ $*"
+}
+'"$1"'
+ret=$?
+needles=
+for v in $test_export_
+do
+ needles="$needles;s/^$v=/export $v=/p"
+done
+set | sed -n "s'"/'/'\\\\''/g"'$needles" >test_vars
+exit $ret' >&3 2>&4
+ eval_ret=$?
+
+ if test $eval_ret = 0 || test -n "$expecting_failure"
+ then
+ test_eval_ "$test_cleanup"
+ . ./test_vars || error "failed to load updated environment"
+ fi
+ if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
+ echo ""
+ fi
+ return "$eval_ret"
+}
+
+test_wrapper_ () {
+ local test_wrapper_func_="$1"; shift
+ local test_title_="$1"; shift
+ test_start_
+ test_prereq=
+ test_perf_setup_=
+ while test $# != 0
+ do
+ case $1 in
+ --prereq)
+ test_prereq=$2
+ shift
+ ;;
+ --setup)
+ test_perf_setup_=$2
+ shift
+ ;;
+ *)
+ break
+ ;;
+ esac
+ shift
+ done
+ test "$#" = 1 || BUG "test_wrapper_ needs 2 positional parameters"
+ export test_prereq
+ export test_perf_setup_
+
+ if ! test_skip "$test_title_" "$@"
+ then
+ base=$(basename "$0" .sh)
+ echo "$test_count" >>"$perf_results_dir"/$base.subtests
+ echo "$test_title_" >"$perf_results_dir"/$base.$test_count.descr
+ base="$perf_results_dir"/"$PERF_RESULTS_PREFIX$(basename "$0" .sh)"."$test_count"
+ "$test_wrapper_func_" "$test_title_" "$@"
+ fi
+
+ test_finish_
+}
+
+test_perf_ () {
+ if test -z "$verbose"; then
+ printf "%s" "perf $test_count - $1:"
+ else
+ echo "perf $test_count - $1:"
+ fi
+ for i in $(test_seq 1 $GIT_PERF_REPEAT_COUNT); do
+ if test -n "$test_perf_setup_"
+ then
+ say >&3 "setup: $test_perf_setup_"
+ if ! test_eval_ $test_perf_setup_
+ then
+ test_failure_ "$test_perf_setup_"
+ break
+ fi
+
+ fi
+ say >&3 "running: $2"
+ if test_run_perf_ "$2"
+ then
+ if test -z "$verbose"; then
+ printf " %s" "$i"
+ else
+ echo "* timing run $i/$GIT_PERF_REPEAT_COUNT:"
+ fi
+ else
+ test -z "$verbose" && echo
+ test_failure_ "$@"
+ break
+ fi
+ done
+ if test -z "$verbose"; then
+ echo " ok"
+ else
+ test_ok_ "$1"
+ fi
+ "$TEST_DIRECTORY"/perf/min_time.perl test_time.* >"$base".result
+ rm test_time.*
+}
+
+# Usage: test_perf 'title' [options] 'perf-test'
+# Run the performance test script specified in perf-test with
+# optional prerequisite and setup steps.
+# Options:
+# --prereq prerequisites: Skip the test if prequisites aren't met
+# --setup "setup-steps": Run setup steps prior to each measured iteration
+#
+test_perf () {
+ test_wrapper_ test_perf_ "$@"
+}
+
+test_size_ () {
+ if test -n "$test_perf_setup_"
+ then
+ say >&3 "setup: $test_perf_setup_"
+ test_eval_ $test_perf_setup_
+ fi
+
+ say >&3 "running: $2"
+ if test_eval_ "$2" 3>"$base".result; then
+ test_ok_ "$1"
+ else
+ test_failure_ "$@"
+ fi
+}
+
+# Usage: test_size 'title' [options] 'size-test'
+# Run the size test script specified in size-test with optional
+# prerequisites and setup steps. Returns the numeric value
+# returned by size-test.
+# Options:
+# --prereq prerequisites: Skip the test if prequisites aren't met
+# --setup "setup-steps": Run setup steps prior to the size measurement
+
+test_size () {
+ test_wrapper_ test_size_ "$@"
+}
+
+# We extend test_done to print timings at the end (./run disables this
+# and does it after running everything)
+test_at_end_hook_ () {
+ if test -z "$GIT_PERF_AGGREGATING_LATER"; then
+ (
+ cd "$TEST_DIRECTORY"/perf &&
+ ./aggregate.perl --results-dir="$TEST_RESULTS_DIR" $(basename "$0")
+ )
+ fi
+}
+
+test_export () {
+ export "$@"
+}
+
+test_lazy_prereq PERF_EXTRA 'test_bool_env GIT_PERF_EXTRA false'
diff --git a/t/perf/repos/.gitignore b/t/perf/repos/.gitignore
new file mode 100644
index 0000000..72e3dc3
--- /dev/null
+++ b/t/perf/repos/.gitignore
@@ -0,0 +1 @@
+gen-*/
diff --git a/t/perf/repos/inflate-repo.sh b/t/perf/repos/inflate-repo.sh
new file mode 100755
index 0000000..fcfc992
--- /dev/null
+++ b/t/perf/repos/inflate-repo.sh
@@ -0,0 +1,85 @@
+#!/bin/sh
+# Inflate the size of an EXISTING repo.
+#
+# This script should be run inside the worktree of a TEST repo.
+# It will use the contents of the current HEAD to generate a
+# commit containing copies of the current worktree such that the
+# total size of the commit has at least <target_size> files.
+#
+# Usage: [-t target_size] [-b branch_name]
+
+set -e
+
+target_size=10000
+branch_name=p0006-ballast
+ballast=ballast
+
+while test "$#" -ne 0
+do
+ case "$1" in
+ -b)
+ shift;
+ test "$#" -ne 0 || { echo 'error: -b requires an argument' >&2; exit 1; }
+ branch_name=$1;
+ shift ;;
+ -t)
+ shift;
+ test "$#" -ne 0 || { echo 'error: -t requires an argument' >&2; exit 1; }
+ target_size=$1;
+ shift ;;
+ *)
+ echo "error: unknown option '$1'" >&2; exit 1 ;;
+ esac
+done
+
+git ls-tree -r HEAD >GEN_src_list
+nr_src_files=$(cat GEN_src_list | wc -l)
+
+src_branch=$(git symbolic-ref --short HEAD)
+
+echo "Branch $src_branch initially has $nr_src_files files."
+
+if test $target_size -le $nr_src_files
+then
+ echo "Repository already exceeds target size $target_size."
+ rm GEN_src_list
+ exit 1
+fi
+
+# Create well-known branch and add 1 file change to start
+# if off before the ballast.
+git checkout -b $branch_name HEAD
+echo "$target_size" > inflate-repo.params
+git add inflate-repo.params
+git commit -q -m params
+
+# Create ballast for in our branch.
+copy=1
+nr_files=$nr_src_files
+while test $nr_files -lt $target_size
+do
+ sed -e "s| | $ballast/$copy/|" <GEN_src_list |
+ git update-index --index-info
+
+ nr_files=$(expr $nr_files + $nr_src_files)
+ copy=$(expr $copy + 1)
+done
+rm GEN_src_list
+git commit -q -m "ballast"
+
+# Modify 1 file and commit.
+echo "$target_size" >> inflate-repo.params
+git add inflate-repo.params
+git commit -q -m "ballast plus 1"
+
+nr_files=$(git ls-files | wc -l)
+
+# Checkout master to put repo in canonical state (because
+# the perf test may need to clone and enable sparse-checkout
+# before attempting to checkout a commit with the ballast
+# (because it may contain 100K directories and 1M files)).
+git checkout $src_branch
+
+echo "Repository inflated. Branch $branch_name has $nr_files files."
+
+exit 0
diff --git a/t/perf/repos/many-files.sh b/t/perf/repos/many-files.sh
new file mode 100755
index 0000000..28720e4
--- /dev/null
+++ b/t/perf/repos/many-files.sh
@@ -0,0 +1,110 @@
+#!/bin/sh
+# Generate test data repository using the given parameters.
+# When omitted, we create "gen-many-files-d-w-f.git".
+#
+# Usage: [-r repo] [-d depth] [-w width] [-f files]
+#
+# -r repo: path to the new repo to be generated
+# -d depth: the depth of sub-directories
+# -w width: the number of sub-directories at each level
+# -f files: the number of files created in each directory
+#
+# Note that all files will have the same SHA-1 and each
+# directory at a level will have the same SHA-1, so we
+# will potentially have a large index, but not a large
+# ODB.
+#
+# Ballast will be created under "ballast/".
+
+EMPTY_BLOB=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
+
+set -e
+
+# (5, 10, 9) will create 999,999 ballast files.
+# (4, 10, 9) will create 99,999 ballast files.
+depth=5
+width=10
+files=9
+
+while test "$#" -ne 0
+do
+ case "$1" in
+ -r)
+ shift;
+ test "$#" -ne 0 || { echo 'error: -r requires an argument' >&2; exit 1; }
+ repo=$1;
+ shift ;;
+ -d)
+ shift;
+ test "$#" -ne 0 || { echo 'error: -d requires an argument' >&2; exit 1; }
+ depth=$1;
+ shift ;;
+ -w)
+ shift;
+ test "$#" -ne 0 || { echo 'error: -w requires an argument' >&2; exit 1; }
+ width=$1;
+ shift ;;
+ -f)
+ shift;
+ test "$#" -ne 0 || { echo 'error: -f requires an argument' >&2; exit 1; }
+ files=$1;
+ shift ;;
+ *)
+ echo "error: unknown option '$1'" >&2; exit 1 ;;
+ esac
+done
+
+# Inflate the index with thousands of empty files.
+# usage: dir depth width files
+fill_index() {
+ awk -v arg_dir=$1 -v arg_depth=$2 -v arg_width=$3 -v arg_files=$4 '
+ function make_paths(dir, depth, width, files, f, w) {
+ for (f = 1; f <= files; f++) {
+ print dir "/file" f
+ }
+ if (depth > 0) {
+ for (w = 1; w <= width; w++) {
+ make_paths(dir "/dir" w, depth - 1, width, files)
+ }
+ }
+ }
+ END { make_paths(arg_dir, arg_depth, arg_width, arg_files) }
+ ' </dev/null |
+ sed "s/^/100644 $EMPTY_BLOB /" |
+ git update-index --index-info
+ return 0
+}
+
+[ -z "$repo" ] && repo=gen-many-files-$depth.$width.$files.git
+
+mkdir $repo
+cd $repo
+git init .
+
+# Create an initial commit just to define master.
+touch many-files.empty
+echo "$depth $width $files" >many-files.params
+git add many-files.*
+git commit -q -m params
+
+# Create ballast for p0006 based upon the given params and
+# inflate the index with thousands of empty files and commit.
+git checkout -b p0006-ballast
+fill_index "ballast" $depth $width $files
+git commit -q -m "ballast"
+
+nr_files=$(git ls-files | wc -l)
+
+# Modify 1 file and commit.
+echo "$depth $width $files" >>many-files.params
+git add many-files.params
+git commit -q -m "ballast plus 1"
+
+# Checkout master to put repo in canonical state (because
+# the perf test may need to clone and enable sparse-checkout
+# before attempting to checkout a commit with the ballast
+# (because it may contain 100K directories and 1M files)).
+git checkout master
+
+echo "Repository "$repo" ($depth, $width, $files) created. Ballast $nr_files."
+exit 0
diff --git a/t/perf/run b/t/perf/run
new file mode 100755
index 0000000..34115ed
--- /dev/null
+++ b/t/perf/run
@@ -0,0 +1,257 @@
+#!/bin/sh
+
+die () {
+ echo >&2 "error: $*"
+ exit 1
+}
+
+while [ $# -gt 0 ]; do
+ arg="$1"
+ case "$arg" in
+ --)
+ break ;;
+ --help)
+ echo "usage: $0 [--config file] [--subsection subsec] [other_git_tree...] [--] [test_scripts]"
+ exit 0 ;;
+ --config)
+ shift
+ GIT_PERF_CONFIG_FILE=$(cd "$(dirname "$1")"; pwd)/$(basename "$1")
+ export GIT_PERF_CONFIG_FILE
+ shift ;;
+ --subsection)
+ shift
+ GIT_PERF_SUBSECTION="$1"
+ export GIT_PERF_SUBSECTION
+ shift ;;
+ --*)
+ die "unrecognised option: '$arg'" ;;
+ *)
+ break ;;
+ esac
+done
+
+run_one_dir () {
+ if test $# -eq 0; then
+ set -- p????-*.sh
+ fi
+ echo "=== Running $# tests in ${GIT_TEST_INSTALLED:-this tree} ==="
+ for t in "$@"; do
+ ./$t $GIT_TEST_OPTS
+ done
+}
+
+unpack_git_rev () {
+ rev=$1
+ echo "=== Unpacking $rev in build/$rev ==="
+ mkdir -p build/$rev
+ (cd "$(git rev-parse --show-cdup)" && git archive --format=tar $rev) |
+ (cd build/$rev && tar x)
+}
+
+build_git_rev () {
+ rev=$1
+ name="$2"
+ for config in config.mak config.mak.autogen config.status
+ do
+ if test -e "../../$config"
+ then
+ cp "../../$config" "build/$rev/"
+ fi
+ done
+ echo "=== Building $rev ($name) ==="
+ (
+ cd build/$rev &&
+ if test -n "$GIT_PERF_MAKE_COMMAND"
+ then
+ sh -c "$GIT_PERF_MAKE_COMMAND"
+ else
+ make $GIT_PERF_MAKE_OPTS
+ fi
+ ) || die "failed to build revision '$mydir'"
+}
+
+set_git_test_installed () {
+ mydir=$1
+
+ mydir_abs=$(cd $mydir && pwd)
+ mydir_abs_wrappers="$mydir_abs/bin-wrappers"
+ if test -d "$mydir_abs_wrappers"
+ then
+ GIT_TEST_INSTALLED=$mydir_abs_wrappers
+ else
+ # Older versions of git lacked bin-wrappers;
+ # fallback to the files in the root.
+ GIT_TEST_INSTALLED=$mydir_abs
+ fi
+ export GIT_TEST_INSTALLED
+ PERF_SET_GIT_TEST_INSTALLED=true
+ export PERF_SET_GIT_TEST_INSTALLED
+}
+
+run_dirs_helper () {
+ mydir=${1%/}
+ shift
+ while test $# -gt 0 -a "$1" != -- -a ! -f "$1"; do
+ shift
+ done
+ if test $# -gt 0 -a "$1" = --; then
+ shift
+ fi
+
+ PERF_RESULTS_PREFIX=
+ if test "$mydir" = "."
+ then
+ unset GIT_TEST_INSTALLED
+ elif test -d "$mydir"
+ then
+ PERF_RESULTS_PREFIX=bindir$(cd $mydir && printf "%s" "$(pwd)" | tr -c "[a-zA-Z0-9]" "_").
+ set_git_test_installed "$mydir"
+ else
+ rev=$(git rev-parse --verify "$mydir" 2>/dev/null) ||
+ die "'$mydir' is neither a directory nor a valid revision"
+ if [ ! -d build/$rev ]; then
+ unpack_git_rev $rev
+ fi
+ build_git_rev $rev "$mydir"
+ mydir=build/$rev
+
+ PERF_RESULTS_PREFIX=build_$rev.
+ set_git_test_installed "$mydir"
+ fi
+ export PERF_RESULTS_PREFIX
+
+ run_one_dir "$@"
+}
+
+run_dirs () {
+ while test $# -gt 0 -a "$1" != -- -a ! -f "$1"; do
+ run_dirs_helper "$@"
+ shift
+ done
+}
+
+get_subsections () {
+ section="$1"
+ test -z "$GIT_PERF_CONFIG_FILE" && return
+ git config -f "$GIT_PERF_CONFIG_FILE" --name-only --get-regex "$section\..*\.[^.]+" |
+ sed -e "s/$section\.\(.*\)\..*/\1/" | sort | uniq
+}
+
+get_var_from_env_or_config () {
+ env_var="$1"
+ conf_sec="$2"
+ conf_var="$3"
+ conf_opts="$4" # optional
+
+ # Do nothing if the env variable is already set
+ eval "test -z \"\${$env_var+x}\"" || return
+
+ test -z "$GIT_PERF_CONFIG_FILE" && return
+
+ # Check if the variable is in the config file
+ if test -n "$GIT_PERF_SUBSECTION"
+ then
+ var="$conf_sec.$GIT_PERF_SUBSECTION.$conf_var"
+ conf_value=$(git config $conf_opts -f "$GIT_PERF_CONFIG_FILE" "$var") &&
+ eval "$env_var=\"$conf_value\"" && return
+ fi
+ var="$conf_sec.$conf_var"
+ conf_value=$(git config $conf_opts -f "$GIT_PERF_CONFIG_FILE" "$var") &&
+ eval "$env_var=\"$conf_value\""
+}
+
+run_subsection () {
+ get_var_from_env_or_config "GIT_PERF_REPEAT_COUNT" "perf" "repeatCount" "--int"
+ : ${GIT_PERF_REPEAT_COUNT:=3}
+ export GIT_PERF_REPEAT_COUNT
+
+ get_var_from_env_or_config "GIT_PERF_DIRS_OR_REVS" "perf" "dirsOrRevs"
+ set -- $GIT_PERF_DIRS_OR_REVS "$@"
+
+ get_var_from_env_or_config "GIT_PERF_MAKE_COMMAND" "perf" "makeCommand"
+ get_var_from_env_or_config "GIT_PERF_MAKE_OPTS" "perf" "makeOpts"
+
+ get_var_from_env_or_config "GIT_PERF_USE_SCALAR" "perf" "useScalar" "--bool"
+ export GIT_PERF_USE_SCALAR
+
+ get_var_from_env_or_config "GIT_PERF_REPO_NAME" "perf" "repoName"
+ export GIT_PERF_REPO_NAME
+
+ GIT_PERF_AGGREGATING_LATER=t
+ export GIT_PERF_AGGREGATING_LATER
+
+ if test $# = 0 -o "$1" = -- -o -f "$1"; then
+ set -- . "$@"
+ fi
+
+ codespeed_opt=
+ test "$GIT_PERF_CODESPEED_OUTPUT" = "true" && codespeed_opt="--codespeed"
+
+ run_dirs "$@"
+
+ if test -z "$GIT_PERF_SEND_TO_CODESPEED"
+ then
+ ./aggregate.perl --results-dir="$TEST_RESULTS_DIR" $codespeed_opt "$@"
+ else
+ json_res_file=""$TEST_RESULTS_DIR"/$GIT_PERF_SUBSECTION/aggregate.json"
+ ./aggregate.perl --results-dir="$TEST_RESULTS_DIR" --codespeed "$@" | tee "$json_res_file"
+ send_data_url="$GIT_PERF_SEND_TO_CODESPEED/result/add/json/"
+ curl -v --request POST --data-urlencode "json=$(cat "$json_res_file")" "$send_data_url"
+ fi
+}
+
+get_var_from_env_or_config "GIT_PERF_CODESPEED_OUTPUT" "perf" "codespeedOutput" "--bool"
+get_var_from_env_or_config "GIT_PERF_SEND_TO_CODESPEED" "perf" "sendToCodespeed"
+
+cd "$(dirname $0)"
+. ../../GIT-BUILD-OPTIONS
+
+if test -n "$TEST_OUTPUT_DIRECTORY"
+then
+ TEST_RESULTS_DIR="$TEST_OUTPUT_DIRECTORY/test-results"
+else
+ TEST_RESULTS_DIR=test-results
+fi
+
+mkdir -p "$TEST_RESULTS_DIR"
+get_subsections "perf" >"$TEST_RESULTS_DIR"/run_subsections.names
+
+if test $(wc -l <"$TEST_RESULTS_DIR"/run_subsections.names) -eq 0
+then
+ if test -n "$GIT_PERF_SUBSECTION"
+ then
+ if test -n "$GIT_PERF_CONFIG_FILE"
+ then
+ die "no subsections are defined in config file '$GIT_PERF_CONFIG_FILE'"
+ else
+ die "subsection '$GIT_PERF_SUBSECTION' defined without a config file"
+ fi
+ fi
+ (
+ run_subsection "$@"
+ )
+elif test -n "$GIT_PERF_SUBSECTION"
+then
+ grep -E "^$GIT_PERF_SUBSECTION\$" "$TEST_RESULTS_DIR"/run_subsections.names >/dev/null ||
+ die "subsection '$GIT_PERF_SUBSECTION' not found in '$GIT_PERF_CONFIG_FILE'"
+
+ grep -E "^$GIT_PERF_SUBSECTION\$" "$TEST_RESULTS_DIR"/run_subsections.names | while read -r subsec
+ do
+ (
+ GIT_PERF_SUBSECTION="$subsec"
+ export GIT_PERF_SUBSECTION
+ echo "======== Run for subsection '$GIT_PERF_SUBSECTION' ========"
+ run_subsection "$@"
+ )
+ done
+else
+ while read -r subsec
+ do
+ (
+ GIT_PERF_SUBSECTION="$subsec"
+ export GIT_PERF_SUBSECTION
+ echo "======== Run for subsection '$GIT_PERF_SUBSECTION' ========"
+ run_subsection "$@"
+ )
+ done <"$TEST_RESULTS_DIR"/run_subsections.names
+fi