grit://cooking/bench/switch/branch@synth-100k

grit switch · branch @synth-100k

Switch branch on 100k-file synthetic vs git switch

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

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

tool	median	min	max	runs	peak memory
git	138 ms	131 ms	150 ms	57	36 MB
grit	83 ms	70 ms	94 ms	57	43 MB

grit is 1.7× fastermemory: 1.2× more

every timed run (log scale)

git

grit

55 ms188 ms

How it's measured

before each run

grit-bench prepare-switch --git git

git runs

$ git switch -q bench-b && git switch -q bench-a

grit runs

$ grit switch bench-b && grit switch bench-a

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

git · median run 138 ms

index: do_write_index ×2

39 ms

index: preload ×4

31 ms

unpack_trees: unpack_trees ×2

28 ms

unpack_trees: traverse_trees ×2

17 ms

index: do_read_index ×2

9.6 ms

index: refresh ×2

2.4 ms

cache_tree: update ×2

1.5 ms

cache_tree: read ×2

0.3 ms

cache_tree: write ×2

0.2 ms

grit · median run 83 ms

grit.index.write ×2

36 ms

grit.index.read ×2

15 ms

grit.repository.open ×2

0.4 ms

grit.config.load ×6

0.2 ms

grit.pack.index.open ×3

0.1 ms

Every day8 days

date	grit commit	git	grit	grit vs git	grit peak
2026-10-27	8dbc58e77	138 ms	83 ms	1.7× faster	43 MB
2026-10-26	c7cf2c443	237 ms	105 ms	2.3× faster	56 MB
2026-10-25	2824ad391	164 ms	92 ms	1.8× faster	42 MB
2026-10-24	157a05dde	148 ms	89 ms	1.7× faster	42 MB
2026-10-23	bddf92f86	170 ms	97 ms	1.8× faster	41 MB
2026-10-22	4c131b942	156 ms	103 ms	1.5× faster	41 MB
2026-10-21	d4844e92a	137 ms	99 ms	1.4× faster	40 MB
2026-10-20	4754ad0b9	156 ms	109 ms	1.4× faster	40 MB