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-rwxr-xr-xt/perf/p5311-pack-bitmaps-fetch.sh54
1 files changed, 54 insertions, 0 deletions
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