88 lines
2.4 KiB
Bash
88 lines
2.4 KiB
Bash
|
#!/bin/sh
|
||
|
|
|
||
|
|
test_description='performance with large numbers of packs'
|
||
|
|
. ./perf-lib.sh
|
||
|
|
|
||
|
|
test_perf_large_repo
|
||
|
|
|
||
|
|
# A real many-pack situation would probably come from having a lot of pushes
|
||
|
|
# over time. We don't know how big each push would be, but we can fake it by
|
||
|
|
# just walking the first-parent chain and having every 5 commits be their own
|
||
|
|
# "push". This isn't _entirely_ accurate, as real pushes would have some
|
||
|
|
# duplicate objects due to thin-pack fixing, but it's a reasonable
|
||
|
|
# approximation.
|
||
|
|
#
|
||
|
|
# And then all of the rest of the objects can go in a single packfile that
|
||
|
|
# represents the state before any of those pushes (actually, we'll generate
|
||
|
|
# that first because in such a setup it would be the oldest pack, and we sort
|
||
|
|
# the packs by reverse mtime inside git).
|
||
|
|
repack_into_n () {
|
||
|
|
rm -rf staging &&
|
||
|
|
mkdir staging &&
|
||
|
|
|
||
|
|
git rev-list --first-parent HEAD |
|
||
|
|
sed -n '1~5p' |
|
||
|
|
head -n "$1" |
|
||
|
|
perl -e 'print reverse <>' \
|
||
|
|
>pushes
|
||
|
|
|
||
|
|
# create base packfile
|
||
|
|
head -n 1 pushes |
|
||
|
|
git pack-objects --delta-base-offset --revs staging/pack
|
||
|
|
|
||
|
|
# and then incrementals between each pair of commits
|
||
|
|
last= &&
|
||
|
|
while read rev
|
||
|
|
do
|
||
|
|
if test -n "$last"; then
|
||
|
|
{
|
||
|
|
echo "$rev" &&
|
||
|
|
echo "^$last"
|
||
|
|
} |
|
||
|
|
git pack-objects --delta-base-offset --revs \
|
||
|
|
staging/pack || return 1
|
||
|
|
fi
|
||
|
|
last=$rev
|
||
|
|
done <pushes &&
|
||
|
|
|
||
|
|
# and install the whole thing
|
||
|
|
rm -f .git/objects/pack/* &&
|
||
|
|
mv staging/* .git/objects/pack/
|
||
|
|
}
|
||
|
|
|
||
|
|
# Pretend we just have a single branch and no reflogs, and that everything is
|
||
|
|
# in objects/pack; that makes our fake pack-building via repack_into_n()
|
||
|
|
# much simpler.
|
||
|
|
test_expect_success 'simplify reachability' '
|
||
|
|
tip=$(git rev-parse --verify HEAD) &&
|
||
|
|
git for-each-ref --format="option no-deref%0adelete %(refname)" |
|
||
|
|
git update-ref --stdin &&
|
||
|
|
rm -rf .git/logs &&
|
||
|
|
git update-ref refs/heads/master $tip &&
|
||
|
|
git symbolic-ref HEAD refs/heads/master &&
|
||
|
|
git repack -ad
|
||
|
|
'
|
||
|
|
|
||
|
|
for nr_packs in 1 50 1000
|
||
|
|
do
|
||
|
|
test_expect_success "create $nr_packs-pack scenario" '
|
||
|
|
repack_into_n $nr_packs
|
||
|
|
'
|
||
|
|
|
||
|
|
test_perf "rev-list ($nr_packs)" '
|
||
|
|
git rev-list --objects --all >/dev/null
|
||
|
|
'
|
||
|
|
|
||
|
|
# This simulates the interesting part of the repack, which is the
|
||
|
|
# actual pack generation, without smudging the on-disk setup
|
||
|
|
# between trials.
|
||
|
|
test_perf "repack ($nr_packs)" '
|
||
|
|
git pack-objects --keep-true-parents \
|
||
|
|
--honor-pack-keep --non-empty --all \
|
||
|
|
--reflog --indexed-objects --delta-base-offset \
|
||
|
|
--stdout </dev/null >/dev/null
|
||
|
|
'
|
||
|
|
done
|
||
|
|
|
||
|
|
test_done
|