git/t/perf/p0008-odb-fsync.sh

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#!/bin/sh
#
# This test measures the performance of adding new files to the object
# database. The test was originally added to measure the effect of the
# core.fsyncMethod=batch mode, which is why we are testing different values of
# that setting explicitly and creating a lot of unique objects.
test_description="Tests performance of adding things to the object database"
. ./perf-lib.sh
. $TEST_DIRECTORY/lib-unique-files.sh
test_perf_fresh_repo
test_checkout_worktree
dir_count=10
files_per_dir=50
total_files=$((dir_count * files_per_dir))
populate_files () {
test_create_unique_files $dir_count $files_per_dir files
}
setup_repo () {
(rm -rf .git || 1) &&
git init &&
test_commit first &&
populate_files
}
test_perf_fsync_cfgs () {
local method &&
local cfg &&
for method in none fsync batch writeout-only
do
case $method in
none)
cfg="-c core.fsync=none"
;;
*)
cfg="-c core.fsync=loose-object -c core.fsyncMethod=$method"
esac &&
# Set GIT_TEST_FSYNC=1 explicitly since fsync is normally
# disabled by t/test-lib.sh.
if ! test_perf "$1 (fsyncMethod=$method)" \
--setup "$2" \
"GIT_TEST_FSYNC=1 git $cfg $3"
then
break
fi
done
}
test_perf_fsync_cfgs "add $total_files files" \
"setup_repo" \
"add -- files"
test_perf_fsync_cfgs "stash $total_files files" \
"setup_repo" \
"stash push -u -- files"
test_perf_fsync_cfgs "unpack $total_files files" \
"
setup_repo &&
git -c core.fsync=none add -- files &&
git -c core.fsync=none commit -q -m second &&
echo HEAD | git pack-objects -q --stdout --revs >test_pack.pack &&
setup_repo
" \
"unpack-objects -q <test_pack.pack"
test_perf_fsync_cfgs "commit $total_files files" \
"
setup_repo &&
git -c core.fsync=none add -- files &&
populate_files
" \
"commit -q -a -m test"
test_done