From c8bae7493d2f2910b57f13ded012e86bdcfb0532 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:47:53 +0200 Subject: Adding upstream version 1:2.39.2. Signed-off-by: Daniel Baumann --- t/perf/p0006-read-tree-checkout.sh | 75 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100755 t/perf/p0006-read-tree-checkout.sh (limited to 't/perf/p0006-read-tree-checkout.sh') 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 -- cgit v1.2.3