grit://cooking/bench/reset/hard@synth-10k

grit reset · hard @synth-10k

Hard reset dirty tree: grit reset --hard HEAD vs git reset --hard HEAD

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 reset/hard@synth-10k2026-10-27 · grit 8dbc58e77 · git version 2.43.0

tool	median	min	max	runs	peak memory
git	15 ms	14 ms	56 ms	80	11 MB
grit	23 ms	22 ms	78 ms	80	24 MB

grit is 1.5× slowermemory: 2.3× more

every timed run (log scale)

git

grit

11 ms98 ms

How it's measured

before each run

grit-bench prepare-worktree-status-dirty --git git

git runs

$ git reset --hard HEAD

grit runs

$ grit reset --hard HEAD

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

git · median run 15 ms

unpack_trees: unpack_trees

7.6 ms

unpack_trees: traverse_trees

5.5 ms

index: do_write_index

2.2 ms

progress: Updating

1.9 ms

cache-tree: prime_cache_tree

1.8 ms

index: do_read_index

0.5 ms

cache_tree: read

0.0 ms

cache_tree: write

0.0 ms

progress: Filtering

0.0 ms

grit · median run 23 ms

grit.index.write

2.9 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	15 ms	23 ms	1.5× slower	24 MB
2026-10-26	c7cf2c443	44 ms	43 ms	par	26 MB
2026-10-25	2824ad391	16 ms	20 ms	1.2× slower	22 MB
2026-10-24	157a05dde	17 ms	23 ms	1.4× slower	23 MB
2026-10-23	bddf92f86	21 ms	52 ms	2.5× slower	25 MB
2026-10-22	4c131b942	20 ms	45 ms	2.3× slower	24 MB
2026-10-21	d4844e92a	16 ms	38 ms	2.3× slower	24 MB
2026-10-20	4754ad0b9	18 ms	41 ms	2.3× slower	23 MB