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-rwxr-xr-xt/perf/p5326-multi-pack-bitmaps.sh67
1 files changed, 67 insertions, 0 deletions
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