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# Helper functions for testing bitmap performance; see p5310.
test_full_bitmap () {
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_perf 'pack to file (bitmap)' '
git pack-objects --use-bitmap-index --all pack1b </dev/null >/dev/null
'
test_perf 'rev-list (commits)' '
git rev-list --all --use-bitmap-index >/dev/null
'
test_perf 'rev-list (objects)' '
git rev-list --all --use-bitmap-index --objects >/dev/null
'
test_perf 'rev-list with tag negated via --not --all (objects)' '
git rev-list perf-tag --not --all --use-bitmap-index --objects >/dev/null
'
test_perf 'rev-list with negative tag (objects)' '
git rev-list HEAD --not perf-tag --use-bitmap-index --objects >/dev/null
'
test_perf 'rev-list count with blob:none' '
git rev-list --use-bitmap-index --count --objects --all \
--filter=blob:none >/dev/null
'
test_perf 'rev-list count with blob:limit=1k' '
git rev-list --use-bitmap-index --count --objects --all \
--filter=blob:limit=1k >/dev/null
'
test_perf 'rev-list count with tree:0' '
git rev-list --use-bitmap-index --count --objects --all \
--filter=tree:0 >/dev/null
'
test_perf 'simulated partial clone' '
git pack-objects --stdout --all --filter=blob:none </dev/null >/dev/null
'
}
test_partial_bitmap () {
test_perf 'clone (partial bitmap)' '
git pack-objects --stdout --all </dev/null >/dev/null
'
test_perf 'pack to file (partial bitmap)' '
git pack-objects --use-bitmap-index --all pack2b </dev/null >/dev/null
'
test_perf 'rev-list with tree filter (partial bitmap)' '
git rev-list --use-bitmap-index --count --objects --all \
--filter=tree:0 >/dev/null
'
}
test_pack_bitmap () {
test_perf "repack to disk" '
git repack -ad
'
test_full_bitmap
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_partial_bitmap
}
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