fsck: add a performance test for skipList
Create a performance test to see how the skipList implementation performs. First we setup N bad commits, then we see how progressively working our way up to 0..N in increments of 10x does. I.e. the needle(s) in the haystack get progressively more numerous. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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t/perf/p1451-fsck-skip-list.sh
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t/perf/p1451-fsck-skip-list.sh
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#!/bin/sh
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test_description='Test fsck skipList performance'
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. ./perf-lib.sh
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test_perf_fresh_repo
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n=1000000
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test_expect_success "setup $n bad commits" '
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for i in $(test_seq 1 $n)
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do
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echo "commit refs/heads/master" &&
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echo "committer C <c@example.com> 1234567890 +0000" &&
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echo "data <<EOF" &&
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echo "$i.Q." &&
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echo "EOF"
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done | q_to_nul | git fast-import
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'
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skip=0
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while test $skip -le $n
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do
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test_expect_success "create skipList for $skip bad commits" '
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git log --format=%H --max-count=$skip |
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sort >skiplist
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'
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test_perf "fsck with $skip skipped bad commits" '
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git -c fsck.skipList=skiplist fsck
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'
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case $skip in
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0) skip=1 ;;
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*) skip=${skip}0 ;;
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esac
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done
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test_done
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