Subject: [PATCH 18/25] perf: add performance test for pickaxe

From: Ævar Arnfjörð Bjarmason <[email-masked]>
Date: Wed, 3 Feb 2021 04:28:04 +0100

Add a test for the -G and -S pickaxe options and related options. This
test supports being run with GIT_PERF_EXTRA=1 to turn on the full set
of tests, as well as GIT_TEST_LONG=1 to opt-in a full history walk. By
default I'm limiting the walk to 500 commits, which seems to hit a
good spot on git.git of around 0.5s per iteration.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email-masked]>
---
 t/perf/p4209-pickaxe.sh | 82 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100755 t/perf/p4209-pickaxe.sh

diff --git a/t/perf/p4209-pickaxe.sh b/t/perf/p4209-pickaxe.sh
new file mode 100755
index 0000000000..011a287d3b
--- /dev/null
+++ b/t/perf/p4209-pickaxe.sh
@@ -0,0 +1,82 @@
+#!/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=
+if ! test_have_prereq EXPENSIVE
+then
+	max_count=500
+	from_rev=" $(git rev-list HEAD | head -n $max_count | tail -n 1).."
+	from_rev_desc=" <limit-rev>.."
+fi
+
+for icase in \
+	'' \
+	'-i '
+do
+	# -S (no regex)
+	for pattern in \
+		'a' \
+		'uncommon'\
+		'ö'
+	do
+		for opts in \
+			'-S'
+		do
+			continue
+			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  \
+		'[þæö]'
+	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  \
+		'a' \
+		'uncommon' \
+		'[þæö]'
+	do
+		for opts in \
+			'-G' \
+			'--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
+
+		# -G extra
+		for opts in \
+			'--text -G' \
+			'--text --pickaxe-all -G' \
+			'--pickaxe-all -G' \
+			'--pickaxe-all --pickaxe-regex -S'
+		do
+			test_perf PERF_EXTRA "git log $icase$opts'$pattern'$from_rev_desc" "
+				git log --pretty=format:%H $icase$opts'$pattern'$from_rev
+			"
+		done
+	done
+done
+
+test_done
-- 
2.30.0.284.gd98b1dd5eaa7