grit://cooking/bench/pull/check@git-git

grit pull · check @git-git

Pull --check reports fast-forward possibility without changing HEAD

repo: Upstream git/git pinned at v2.47.0, full history · 4,525 files · 75,031 commits · 954 refs

$ grit-bench daily --only pull/check@git-git2026-10-27 · grit 8dbc58e77 · git version 2.43.0

tool	median	min	max	runs	peak memory
git	108 ms	105 ms	111 ms	20	68 MB
grit	45 ms	43 ms	51 ms	20	48 MB

grit is 2.4× fastermemory: 1.4× less

every timed run (log scale)

git

grit

34 ms139 ms

How it's measured

setup

remote http://127.0.0.1:43219/remote.git served by git http-backend (git's own smart HTTP server)

before each run

grit-bench prepare-network-fetch-incr --git git --bare /tmp/grit-bench-scratch/daily-remote-git-git/remote.git

git runs

$ git fetch -q origin master && git rev-list --left-right --count HEAD...origin/master >/dev/null

grit runs

$ grit pull --check origin master

checked first

before timing, git and grit were each run once and their results compared

Where the time goesone extra traced run per tool, outside the timed runs

git · median run 108 ms

run: git remote-http

83 ms

run: git-remote-http

82 ms

fetch: fetch_refs

57 ms

run: git fetch-pack

57 ms

fetch-pack: negotiation_v0_v1

18 ms

fetch: consume_refs

17 ms

run: git rev-list

16 ms

fetch-pack: parse_remote_refs_and_find_cutoff

14 ms

fetch: remote_refs

7.4 ms

fetch-pack: mark_common_remote_refs

6.5 ms

run: git index-pack

5.6 ms

negotiation_: round

3.2 ms

run: git maintenance

1.9 ms

fetch-pack: mark_complete_local_refs

0.8 ms

index: do_read_index

0.3 ms

submodule: parallel/fetch

0.0 ms

cache_tree: read

0.0 ms

grit · median run 45 ms

grit.pack.index

1.2 ms

grit.pack.index.open ×93

0.5 ms

grit.pack.delta.resolve

0.4 ms

grit.repository.open

0.2 ms

grit.config.load ×2

0.1 ms

Every day8 days

date	grit commit	git	grit	grit vs git	grit peak
2026-10-27	8dbc58e77	108 ms	45 ms	2.4× faster	48 MB
2026-10-26	c7cf2c443	106 ms	146 ms	1.4× slower	93 MB
2026-10-25	2824ad391	111 ms	53 ms	2.1× faster	48 MB
2026-10-24	157a05dde	113 ms	742 ms	6.6× slower	65 MB
2026-10-23	bddf92f86	106 ms	692 ms	6.5× slower	100 MB
2026-10-22	4c131b942	—	fail	—	—
2026-10-21	d4844e92a	—	not run	—	—
2026-10-20	4754ad0b9	—	not run	—	—