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John Cai eb54a3391b cat-file: skip expanding default format 
When format is passed into --batch, --batch-check, --batch-command,
the format gets expanded. When nothing is passed in, the default format
is set and the expand_format() gets called.

We can save on these cycles by hardcoding how to print the
information when nothing is passed as the format, or when the default
format is passed. There is no need for the fully expanded format with
the default. Since batch_object_write() happens on every object provided
in batch mode, we get a nice performance improvement.

git rev-list --all > /tmp/all-obj.txt

git cat-file --batch-check </tmp/all-obj.txt

with HEAD^:

Time (mean ± σ): 57.6 ms ± 1.7 ms [User: 51.5 ms, System: 6.2 ms]
Range (min … max): 54.6 ms … 64.7 ms 50 runs

with HEAD:

Time (mean ± σ): 49.8 ms ± 1.7 ms [User: 42.6 ms, System: 7.3 ms]
Range (min … max): 46.9 ms … 55.9 ms 56 runs

If nothing is provided as a format argument, or if the default format is
passed, skip expanding of the format and print the object info with a
default format.

See https://lore.kernel.org/git/87eecf8ork.fsf@evledraar.gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
 		2022-03-15 10:15:32 -07:00
..
add.c add: remove support for `git-legacy-stash` 2022-01-27 18:00:15 -08:00
am.c Merge branch 'ab/date-mode-release' 2022-02-25 15:47:36 -08:00
annotate.c
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apply.c
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archive.c
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bisect--helper.c Merge branch 'ac/usage-string-fixups' 2022-03-06 21:25:32 -08:00
blame.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
branch.c Merge branch 'gc/branch-recurse-submodules' 2022-02-18 13:53:29 -08:00
bugreport.c
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bundle.c
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cat-file.c cat-file: skip expanding default format 2022-03-15 10:15:32 -07:00
check-attr.c
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check-ignore.c
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check-mailmap.c
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check-ref-format.c
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checkout--worker.c
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checkout-index.c checkout-index: integrate with sparse index 2022-01-13 13:49:45 -08:00
checkout.c switch: mention the --detach option when dying due to lack of a branch 2022-02-25 22:21:48 -08:00
clean.c Merge branch 'vd/sparse-clean-etc' 2022-02-17 16:25:05 -08:00
clone.c Merge branch 'js/apply-partial-clone-filters-recursively' 2022-02-25 15:47:35 -08:00
column.c
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commit-graph.c Merge branch 'ab/ignore-replace-while-working-on-commit-graph' 2021-11-01 13:48:08 -07:00
commit-tree.c
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commit.c Merge branch 'ab/date-mode-release' 2022-02-25 15:47:36 -08:00
config.c
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count-objects.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
credential-cache--daemon.c
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credential-cache.c
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credential-store.c
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credential.c doc: fix git credential synopsis 2021-10-28 09:57:09 -07:00
describe.c i18n: turn even more messages into "cannot be used together" ones 2022-01-05 13:31:00 -08:00
diff-files.c
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diff-index.c
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diff-tree.c i18n: refactor "foo and bar are mutually exclusive" 2022-01-05 13:29:23 -08:00
diff.c builtin/diff.c: fix "git-diff" usage string typo 2022-02-02 11:30:53 -08:00
difftool.c i18n: factorize more 'incompatible options' messages 2022-02-04 13:58:28 -08:00
env--helper.c
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fast-export.c i18n: fix some misformated placeholders in command synopsis 2022-02-04 13:58:28 -08:00
fast-import.c Merge branch 'ab/c99-designated-initializers' 2022-03-06 21:25:32 -08:00
fetch-pack.c
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fetch.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
fmt-merge-msg.c merge: allow to pretend a merge is made into a different branch 2021-12-20 14:55:02 -08:00
for-each-ref.c for-each-ref: delay parsing of --sort=<atom> options 2021-10-20 14:33:07 -07:00
for-each-repo.c
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fsck.c run-command API users: use strvec_pushl(), not argv construction 2021-11-25 22:15:07 -08:00
gc.c Merge branch 'ab/config-based-hooks-2' 2022-02-09 14:21:00 -08:00
get-tar-commit-id.c
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grep.c Merge branch 'ab/grep-patterntype' 2022-02-25 15:47:36 -08:00
hash-object.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
help.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
hook.c git hook run: add an --ignore-missing flag 2022-01-07 15:19:34 -08:00
index-pack.c index-pack: clarify the breached limit 2022-02-23 17:41:10 -08:00
init-db.c i18n: refactor "foo and bar are mutually exclusive" 2022-01-05 13:29:23 -08:00
interpret-trailers.c
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log.c Merge branch 'ab/grep-patterntype' 2022-02-25 15:47:36 -08:00
ls-files.c ls-files: support --recurse-submodules --stage 2022-02-23 16:41:55 -08:00
ls-remote.c ls-remote & transport API: release "struct transport_ls_refs_options" 2022-02-06 18:02:34 -08:00
ls-tree.c built-ins: trust the "prefix" from run_builtin() 2022-02-15 18:00:50 -08:00
mailinfo.c
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mailsplit.c
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merge-base.c i18n: factorize more 'incompatible options' messages 2022-02-04 13:58:28 -08:00
merge-file.c xdiff: implement a zealous diff3, or "zdiff3" 2021-12-01 14:45:58 -08:00
merge-index.c
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merge-ours.c
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merge-recursive.c
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merge-tree.c
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merge.c Merge branch 'pw/use-in-process-checkout-in-rebase' 2022-02-18 13:53:27 -08:00
mktag.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
mktree.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
multi-pack-index.c builtin/multi-pack-index.c: don't leak concatenated options 2021-10-28 15:32:14 -07:00
mv.c
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name-rev.c name-rev: replace --stdin with --annotate-stdin in synopsis 2022-02-15 17:37:43 -08:00
notes.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
pack-objects.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
pack-redundant.c
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pack-refs.c
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patch-id.c patch-id: fix scan_hunk_header on diffs with 1 line of before/after 2022-02-02 11:24:23 -08:00
prune-packed.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
prune.c Merge branch 'ns/tmp-objdir' 2022-01-03 16:24:15 -08:00
pull.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
push.c i18n: factorize "invalid value" messages 2022-02-04 13:58:28 -08:00
range-diff.c
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read-tree.c
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rebase.c Merge branch 'ja/i18n-common-messages' 2022-02-25 15:47:35 -08:00
receive-pack.c Merge branch 'cb/clear-quarantine-early-on-all-ref-update-errors' 2022-02-18 13:53:27 -08:00
reflog.c Merge branch 'ac/usage-string-fixups' 2022-03-06 21:25:32 -08:00
remote-ext.c
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remote-fd.c
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remote.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
repack.c Merge branch 'ja/i18n-similar-messages' 2022-01-10 11:52:56 -08:00
replace.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
rerere.c
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reset.c Merge branch 'ab/diff-free-more' 2022-02-25 15:47:36 -08:00
rev-list.c i18n: fix some misformated placeholders in command synopsis 2022-02-04 13:58:28 -08:00
rev-parse.c
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revert.c
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rm.c Merge branch 'ja/i18n-similar-messages' 2022-01-10 11:52:56 -08:00
send-pack.c i18n: factorize "invalid value" messages 2022-02-04 13:58:28 -08:00
shortlog.c log: add a --no-graph option 2022-02-11 10:06:41 -08:00
show-branch.c date API: create a date.h, split from cache.h 2022-02-16 09:40:00 -08:00
show-index.c
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show-ref.c
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sparse-checkout.c Merge branch 'en/sparse-checkout-fixes' 2022-03-06 21:25:30 -08:00
stash.c stash: strip "refs/heads/" with skip_prefix 2022-02-24 11:06:18 -08:00
stripspace.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
submodule--helper.c Merge branch 'ac/usage-string-fixups' 2022-03-06 21:25:32 -08:00
symbolic-ref.c
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tag.c date API: create a date.h, split from cache.h 2022-02-16 09:40:00 -08:00
unpack-file.c
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unpack-objects.c
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update-index.c Merge branch 'vd/sparse-clean-etc' 2022-02-17 16:25:05 -08:00
update-ref.c
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update-server-info.c i18n: remove from i18n strings that do not hold translatable parts 2022-02-04 13:58:28 -08:00
upload-archive.c upload-archive: use regular "struct child_process" pattern 2021-11-25 22:15:07 -08:00
upload-pack.c
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var.c var: add GIT_DEFAULT_BRANCH variable 2021-11-03 13:25:36 -07:00
verify-commit.c
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verify-pack.c
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verify-tag.c
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worktree.c Merge branch 'ds/worktree-docs' 2022-03-06 21:25:31 -08:00
write-tree.c
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