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perf: disable automatic housekeeping

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Turn off automatic background maintenance for perf tests by default to
avoid interference with performance measurements.  Do that by using the
new file t/perf/config and using it as the system config file for perf
tests.  Future tests intended to measure gc performance can override
the setting locally or call "git gc" explicitly.

This fixes a breakage in p2000 caused by gc automatically emptying the
reflog due its fake dates from 2005 being older than 90 days.

Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2021-10-09 16:39:24 +02:00 committed by Junio C Hamano
parent 225bc32a98
commit be79131a53
2 changed files with 6 additions and 0 deletions
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2
t/perf/config Normal file
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@ -0,0 +1,2 @@
[gc]
auto = 0

4
t/perf/perf-lib.sh
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@ -27,6 +27,10 @@ TEST_NO_MALLOC_CHECK=t
. ../test-lib.sh
unset GIT_CONFIG_NOSYSTEM
GIT_CONFIG_SYSTEM="$TEST_DIRECTORY/perf/config"
export GIT_CONFIG_SYSTEM
if test -n "$GIT_TEST_INSTALLED" -a -z "$PERF_SET_GIT_TEST_INSTALLED"
then
error "Do not use GIT_TEST_INSTALLED with the perf tests.