From be79131a537f5f35825c01262b2345097a9d2142 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= <l.s.r@web.de>
Date: Sat, 9 Oct 2021 16:39:24 +0200
Subject: perf: disable automatic housekeeping
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

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>

diff --git a/t/perf/config b/t/perf/config
new file mode 100644
index 0000000..b92768b
--- /dev/null
+++ b/t/perf/config
@@ -0,0 +1,2 @@
+[gc]
+	auto = 0
diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
index f5ed092..69ae381 100644
--- a/t/perf/perf-lib.sh
+++ b/t/perf/perf-lib.sh
@@ -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.
-- 
cgit v0.10.2-6-g49f6