grit://cooking/bench/diff/worktree@synth-10k

grit diff · worktree @synth-10k

Worktree diff vs git diff

repo: 10,000-file synthetic repository; canonical cached shape, scenario variants documented by the runner · 10,000 files · 1,000 commits · 800 refs

$ grit-bench daily --only diff/worktree@synth-10k2026-10-27 · grit 8dbc58e77 · git version 2.43.0

tool	median	min	max	runs	peak memory
git	6.4 ms	5.9 ms	30 ms	80	9.5 MB
grit	6.4 ms	5.8 ms	25 ms	80	27 MB

grit is parmemory: 2.8× more

every timed run (log scale)

git

grit

4.6 ms38 ms

How it's measured

before each run

grit-bench prepare-worktree-diff --git git

git runs

$ git diff

grit runs

$ grit diff

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

git · median run 6.4 ms

index: preload

1.9 ms

index: do_read_index

0.5 ms

cache_tree: read

0.0 ms

diff: setup

0.0 ms

diff: write

0.0 ms

grit · median run 6.4 ms

grit.index.read

0.8 ms

grit.repository.open

0.2 ms

grit.config.load ×2

0.1 ms

grit.pack.index.open

0.0 ms

Every day8 days

date	grit commit	git	grit	grit vs git	grit peak
2026-10-27	8dbc58e77	6.4 ms	6.4 ms	par	27 MB
2026-10-26	c7cf2c443	15 ms	13 ms	1.2× faster	21 MB
2026-10-25	2824ad391	7.3 ms	7.9 ms	1.1× slower	22 MB
2026-10-24	157a05dde	7.5 ms	8.4 ms	1.1× slower	18 MB
2026-10-23	bddf92f86	8.1 ms	10 ms	1.2× slower	26 MB
2026-10-22	4c131b942	7.7 ms	12 ms	1.6× slower	22 MB
2026-10-21	d4844e92a	7.1 ms	12 ms	1.6× slower	19 MB
2026-10-20	4754ad0b9	8.8 ms	12 ms	1.4× slower	17 MB