grit://cooking/bench/diff/staged@synth-100k

grit diff · staged @synth-100k

Index vs HEAD diff: grit diff --staged vs git diff --cached

repo: 100,000-file synthetic repository; canonical cached shape · 100,000 files · 1,000 commits · 1,200 refs

$ grit-bench daily --only diff/staged@synth-100k2026-10-27 · grit 8dbc58e77 · git version 2.43.0

tool	median	min	max	runs	peak memory
git	68 ms	65 ms	93 ms	20	30 MB
grit	36 ms	32 ms	45 ms	20	67 MB

grit is 1.9× fastermemory: 2.3× more

every timed run (log scale)

git

grit

26 ms116 ms

How it's measured

before each run

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

git runs

$ git diff --cached

grit runs

$ grit diff --staged

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

git · median run 68 ms

index: do_read_index

6.0 ms

unpack_trees: unpack_trees

1.8 ms

unpack_trees: traverse_trees

0.9 ms

cache_tree: read

0.2 ms

diff: write

0.0 ms

diff: setup

0.0 ms

grit · median run 36 ms

grit.index.read

8.8 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	68 ms	36 ms	1.9× faster	67 MB
2026-10-26	c7cf2c443	97 ms	65 ms	1.5× faster	75 MB
2026-10-25	2824ad391	72 ms	46 ms	1.6× faster	69 MB
2026-10-24	157a05dde	70 ms	46 ms	1.5× faster	69 MB
2026-10-23	bddf92f86	72 ms	49 ms	1.5× faster	69 MB
2026-10-22	4c131b942	72 ms	172 ms	2.4× slower	82 MB
2026-10-21	d4844e92a	68 ms	134 ms	2.0× slower	68 MB
2026-10-20	4754ad0b9	77 ms	128 ms	1.7× slower	65 MB