[PATCH 03/11] Introduce a performance test for git-blame

[Thomas Rast <trast@student.ethz.ch>]

It blames a pseudo-randomly chosen (but fixed as long as the tested
repository remains the same) set of 10 files with various options.
The choice of 10 is arbitrary, but gives a nice runtime with git.git.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
---
 t/perf/p8002-blame.sh |   46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100755 t/perf/p8002-blame.sh

diff --git a/t/perf/p8002-blame.sh b/t/perf/p8002-blame.sh
new file mode 100755
index 0000000..000b9d2
--- /dev/null
+++ b/t/perf/p8002-blame.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+
+test_description="Tests blame performance"
+
+. ./perf-lib.sh
+
+test_perf_default_repo
+
+# Pick 10 files to blame pseudo-randomly.  The sort key is the blob
+# hash, so it is stable.
+test_expect_success 'setup' '
+	git ls-tree HEAD | grep ^100644 |
+	sort -k 3 | head | cut -f 2 >filelist
+'
+
+test_perf 'blame' '
+	while read -r name; do
+		git blame HEAD -- "$name" >/dev/null
+	done <filelist
+'
+
+test_perf 'blame -M' '
+	while read -r name; do
+		git blame -M HEAD -- "$name" >/dev/null
+	done <filelist
+'
+
+test_perf 'blame -C' '
+	while read -r name; do
+		git blame -C HEAD -- "$name" >/dev/null
+	done <filelist
+'
+
+test_perf 'blame -C -C' '
+	while read -r name; do
+		git blame -C -C HEAD -- "$name" >/dev/null
+	done <filelist
+'
+
+test_perf 'blame -C -C -C' '
+	while read -r name; do
+		git blame -C -C -C HEAD -- "$name" >/dev/null
+	done <filelist
+'
+
+test_done
-- 
1.7.10.rc0.230.g16d90