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#!/bin/sh
test_description='Tests pack performance using bitmaps'
. ./perf-lib.sh
test_perf_large_repo
# note that we do everything through config,
# since we want to be able to compare bitmap-aware
# git versus non-bitmap git
#
# We intentionally use the deprecated pack.writebitmaps
# config so that we can test against older versions of git.
test_expect_success 'setup bitmap config' '
git config pack.writebitmaps true &&
git config pack.writebitmaphashcache true
'
test_perf 'repack to disk' '
git repack -ad
'
test_perf 'simulated clone' '
git pack-objects --stdout --all </dev/null >/dev/null
'
test_perf 'simulated fetch' '
have=$(git rev-list HEAD~100 -1) &&
{
echo HEAD &&
echo ^$have
} | git pack-objects --revs --stdout >/dev/null
'
test_expect_success 'create partial bitmap state' '
# pick a commit to represent the repo tip in the past
cutoff=$(git rev-list HEAD~100 -1) &&
orig_tip=$(git rev-parse HEAD) &&
# now kill off all of the refs and pretend we had
# just the one tip
rm -rf .git/logs .git/refs/* .git/packed-refs
git update-ref HEAD $cutoff
# and then repack, which will leave us with a nice
# big bitmap pack of the "old" history, and all of
# the new history will be loose, as if it had been pushed
# up incrementally and exploded via unpack-objects
git repack -Ad
# and now restore our original tip, as if the pushes
# had happened
git update-ref HEAD $orig_tip
'
test_perf 'partial bitmap' '
git pack-objects --stdout --all </dev/null >/dev/null
'
test_done
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