t6200: use test_commit_bulk

There's a loop that creates 30 commits using test_commit. Using
test_commit_bulk speeds this up from:

Benchmark #1: ./t6200-fmt-merge-msg.sh --root=/var/ram/git-tests
Time (mean ± σ):      1.926 s ±  0.240 s    [User: 1.055 s, System: 0.963 s]
Range (min … max):    1.431 s …  2.166 s    10 runs

to:

Benchmark #1: ./t6200-fmt-merge-msg.sh --root=/var/ram/git-tests
Time (mean ± σ):      1.343 s ±  0.179 s    [User: 766.5 ms, System: 662.9 ms]
Range (min … max):    1.032 s …  1.664 s    10 runs

for an average savings of over 30%.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t6200-fmt-merge-msg.sh b/t/t6200-fmt-merge-msg.sh
index 93f23cfa8279ccc093ca332b1eb718c515dd41aa..8a72b4c43a4ff5ba2e2aeb99121ba8ba054dc396 100755 (executable)
--- a/t/t6200-fmt-merge-msg.sh
+++ b/t/t6200-fmt-merge-msg.sh
@@ -66,12 +66,7 @@ test_expect_success setup '
        git commit -a -m "Right #5" &&
 
        git checkout -b long &&
-       i=0 &&
-       while test $i -lt 30
-       do
-               test_commit $i one &&
-               i=$(($i+1))
-       done &&
+       test_commit_bulk --start=0 --message=%s --filename=one 30 &&
 
        git show-branch &&