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-rwxr-xr-xt/perf/p4001-diff-no-index.sh22
-rw-r--r--t/perf/perf-lib.sh4
2 files changed, 25 insertions, 1 deletions
diff --git a/t/perf/p4001-diff-no-index.sh b/t/perf/p4001-diff-no-index.sh
new file mode 100755
index 0000000000..683be6984f
--- /dev/null
+++ b/t/perf/p4001-diff-no-index.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+test_description="Test diff --no-index performance"
+
+. ./perf-lib.sh
+
+test_perf_large_repo
+test_checkout_worktree
+
+file1=$(git ls-files | tail -n 2 | head -1)
+file2=$(git ls-files | tail -n 1 | head -1)
+
+test_expect_success "empty files, so they take no time to diff" "
+ echo >$file1 &&
+ echo >$file2
+"
+
+test_perf "diff --no-index" "
+ git diff --no-index $file1 $file2 >/dev/null
+"
+
+test_done
diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
index f4eecaa171..a8c9574291 100644
--- a/t/perf/perf-lib.sh
+++ b/t/perf/perf-lib.sh
@@ -1,4 +1,6 @@
-#!/bin/sh
+# Performance testing framework. Each perf script starts much like
+# a normal test script, except it sources this library instead of
+# test-lib.sh. See t/perf/README for documentation.
#
# Copyright (c) 2011 Thomas Rast
#