[PATCH v2 3/3] p0003-index.sh: add perf test for the index formats

[Thomas Gummerer <t.gummerer@gmail.com>]

From: Thomas Rast <trast@inf.ethz.ch>

Add a performance test for index version [23]/4 by using
git update-index --index-version=x, thus testing both the reader
and the writer speed of all index formats.

Signed-off-by: Thomas Rast <trast@inf.ethz.ch>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
---
 t/perf/p0003-index.sh | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100755 t/perf/p0003-index.sh

diff --git a/t/perf/p0003-index.sh b/t/perf/p0003-index.sh
new file mode 100755
index 0000000..f2308c0
--- /dev/null
+++ b/t/perf/p0003-index.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+test_description="Tests index versions [23]/4/5"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+test_expect_success "convert to v3" "
+	git update-index --index-version=2
+"
+subdir=$(git ls-files | sed 's#/[^/]*$##' | grep -v '^$' | uniq | tail -n 30 | head -1)
+file=$(git ls-files | tail -n 100 | head -1)
+
+test_expect_success "modify a file" "
+	echo 'foo bar' >>$file
+"
+
+test_perf "v[23]: update-index" "
+	git update-index --index-version=2 >/dev/null
+"
+
+test_perf "v[23]: grep nonexistent -- subdir" "
+	test_must_fail git grep nonexistent -- $subdir >/dev/null
+"
+
+test_perf "v[23]: ls-files -- subdir" "
+	git ls-files $subdir >/dev/null
+"
+
+test_perf --cleanup "git reset" "v[23]: update-index -- file" "
+	git update-index $file
+"
+
+test_expect_success "convert to v4" "
+	git update-index --index-version=4
+"
+
+test_perf "v4: update-index" "
+	git update-index --index-version=4 >/dev/null
+"
+
+test_perf "v4: grep nonexistent -- subdir" "
+	test_must_fail git grep nonexistent -- $subdir >/dev/null
+"
+
+test_perf "v4: ls-files -- subdir" "
+	git ls-files $subdir >/dev/null
+"
+
+test_perf --cleanup "git reset" "v4: update-index -- file" "
+	git update-index $file
+"
+
+test_done
-- 
1.8.3.4.1241.g1ce9896