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| author |  Jeff King <peff@peff.net> | 2014-01-20 21:25:12 -0500 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2014-01-21 14:46:17 -0800 |
| commit | ea97002fc9f682a804ac05212d069e38fa3e365c (patch) | |
| tree | 47be7f758d998a9f4b455eb9a17f2a89f16d6627 /t/perf | |
| parent | Git 1.8.4.5 (diff) | |
| download | tgif-ea97002fc9f682a804ac05212d069e38fa3e365c.tar.xz | |
t/perf: time rev-list with UNINTERESTING commits
We time a straight "rev-list --all" and its "--object"
counterpart, both going all the way to the root. However, we
do not time a partial history walk. This patch adds an
extreme case: a walk over a very small slice of history, but
with a very large set of UNINTERESTING tips. This is similar
to the connectivity check run by git on a small fetch, or
the walk done by any pre-receive hooks that want to check
incoming commits.
This test reveals a performance regression in git v1.8.4.2,
caused by fbd4a70 (list-objects: mark more commits as edges
in mark_edges_uninteresting, 2013-08-16):
Test fbd4a703^ fbd4a703
------------------------------------------------------------------------------------------
0001.1: rev-list --all 0.69(0.67+0.02) 0.69(0.68+0.01) +0.0%
0001.2: rev-list --all --objects 3.47(3.44+0.02) 3.48(3.44+0.03) +0.3%
0001.4: rev-list $commit --not --all 0.04(0.04+0.00) 0.04(0.04+0.00) +0.0%
0001.5: rev-list --objects $commit --not --all 0.04(0.03+0.00) 0.27(0.24+0.02) +575.0%
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/perf')
| -rwxr-xr-x | t/perf/p0001-rev-list.sh | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/t/perf/p0001-rev-list.sh b/t/perf/p0001-rev-list.sh index 4f71a63b0a..16359d51ae 100755 --- a/t/perf/p0001-rev-list.sh +++ b/t/perf/p0001-rev-list.sh @@ -14,4 +14,16 @@ test_perf 'rev-list --all --objects' ' git rev-list --all --objects >/dev/null ' +test_expect_success 'create new unreferenced commit' ' + commit=$(git commit-tree HEAD^{tree} -p HEAD) +' + +test_perf 'rev-list $commit --not --all' ' + git rev-list $commit --not --all >/dev/null +' + +test_perf 'rev-list --objects $commit --not --all' ' + git rev-list --objects $commit --not --all >/dev/null +' + test_done |