grit://cooking/bench/fetch/incremental-http@git-git

grit fetch · incremental-http @git-git

Incremental fetch over grit smart HTTP (git-git bare remote)

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

$ grit-bench daily --only fetch/incremental-http@git-git2026-10-27 · grit 8dbc58e77 · git version 2.43.0

tool	median	min	max	runs	peak memory
git	1.12 s	1.12 s	1.13 s	5	144 MB
grit	519 ms	518 ms	523 ms	5	47 MB

grit is 2.2× fastermemory: 3.0× less

every timed run (log scale)

git

grit

412 ms1.42 s

How it's measured

setup

remote http://127.0.0.1:36355/fixture.git served by grit-http-server

before each run

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

git runs

$ git fetch origin

grit runs

$ grit fetch origin

checked first

before timing, git and grit were each run once and their results compared; the result is verified after every timed run

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

git · median run 1.12 s

run: git remote-http

1.09 s

run: git-remote-http

1.09 s

fetch: fetch_refs

1.06 s

run: git fetch-pack

1.06 s

fetch-pack: negotiation_v0_v1

523 ms

negotiation_: round ×6

17 ms

fetch: consume_refs

17 ms

run: git rev-list

16 ms

fetch-pack: parse_remote_refs_and_find_cutoff

14 ms

run: git index-pack

11 ms

fetch: remote_refs

9.2 ms

fetch-pack: mark_common_remote_refs

6.6 ms

run: git maintenance

1.9 ms

fetch-pack: mark_complete_local_refs

1.0 ms

index: do_read_index

0.4 ms

submodule: parallel/fetch

0.1 ms

cache_tree: read

0.0 ms

grit · median run 519 ms

grit.pack.index

1.6 ms

grit.pack.delta.resolve

0.7 ms

grit.repository.open ×2

0.3 ms

grit.pack.index.open ×33

0.2 ms

grit.config.load ×4

0.1 ms

Every day8 days

date	grit commit	git	grit	grit vs git	grit peak
2026-10-27	8dbc58e77	1.12 s	519 ms	2.2× faster	47 MB
2026-10-26	c7cf2c443	1.93 s	1.43 s	1.4× faster	100 MB
2026-10-25	2824ad391	2.28 s	1.85 s	1.2× faster	64 MB
2026-10-24	157a05dde	45.41 s	44.11 s	par	63 MB
2026-10-23	bddf92f86	90.55 s	92.04 s	par	63 MB
2026-10-22	4c131b942	76.80 s	79.82 s	par	63 MB
2026-10-21	d4844e92a	81.55 s	88.78 s	1.1× slower	62 MB
2026-10-20	4754ad0b9	90.82 s	89.06 s	par	71 MB