[PATCH 6/6] bitmap-lookup-table: add performance tests

["Abhradeep Chakraborty via GitGitGadget" <gitgitgadget@gmail.com>]

From: Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com>

Add performance tests for bitmap lookup table extension.

Mentored-by: Taylor Blau <ttaylorr@github.com>
Co-mentored-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Signed-off-by: Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com>
---
 t/perf/p5310-pack-bitmaps.sh       | 60 +++++++++++++++++++-----------
 t/perf/p5326-multi-pack-bitmaps.sh | 55 +++++++++++++++++----------
 2 files changed, 73 insertions(+), 42 deletions(-)

diff --git a/t/perf/p5310-pack-bitmaps.sh b/t/perf/p5310-pack-bitmaps.sh
index 7ad4f237bc3..a8d9414de92 100755
--- a/t/perf/p5310-pack-bitmaps.sh
+++ b/t/perf/p5310-pack-bitmaps.sh
@@ -10,10 +10,11 @@ test_perf_large_repo
 # since we want to be able to compare bitmap-aware
 # git versus non-bitmap git
 #
-# We intentionally use the deprecated pack.writebitmaps
+# 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
+	git config pack.writeBitmaps true &&
+	git config pack.writeReverseIndex true
 '
 
 # we need to create the tag up front such that it is covered by the repack and
@@ -28,27 +29,42 @@ test_perf 'repack to disk' '
 
 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_perf 'use lookup table' '
+    git config pack.writeBitmapLookupTable true
 '
 
-test_partial_bitmap
+test_perf 'repack to disk (lookup table)' '
+    git repack -adb
+'
+
+test_full_bitmap
+
+for i in false true
+do
+	$i && lookup=" (lookup table)"
+	test_expect_success "create partial bitmap state$lookup" '
+		git config pack.writeBitmapLookupTable '"$i"' &&
+		# pick a commit to represent the repo tip in the past
+		cutoff=$(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
+done
 
 test_done
diff --git a/t/perf/p5326-multi-pack-bitmaps.sh b/t/perf/p5326-multi-pack-bitmaps.sh
index f2fa228f16a..9001eb4533e 100755
--- a/t/perf/p5326-multi-pack-bitmaps.sh
+++ b/t/perf/p5326-multi-pack-bitmaps.sh
@@ -26,27 +26,42 @@ test_expect_success 'drop pack bitmap' '
 
 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 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_expect_success 'use lookup table' '
+	git config pack.writeBitmapLookupTable true
 '
 
-test_partial_bitmap
+test_perf 'setup multi-pack-index (lookup table)' '
+	git multi-pack-index write --bitmap
+'
+
+test_full_bitmap
+
+for i in false true
+do
+	$i && lookup=" (lookup table)"
+	test_expect_success "create partial bitmap state$lookup" '
+		git config pack.writeBitmapLookupTable '"$i"' &&
+		# pick a commit to represent the repo tip in the past
+		cutoff=$(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
+done
 
 test_done
-- 
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