grit://cooking/bench/pull/rebase@synth-10k

grit pull · rebase @synth-10k

Rebase pull (3 local onto 5 upstream) vs git pull --rebase

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 pull/rebase@synth-10k2026-10-27 · grit 8dbc58e77 · git version 2.43.0

tool	median	min	max	runs	peak memory
git	71 ms	67 ms	95 ms	20	37 MB
grit	19 ms	18 ms	36 ms	20	24 MB

grit is 3.7× fastermemory: 1.5× less

every timed run (log scale)

git

grit

15 ms119 ms

How it's measured

setup

remote http://127.0.0.1:32913/remote.git served by git http-backend (git's own smart HTTP server)

before each run

grit-bench prepare-network-pull-rebase --git git --bare /tmp/grit-bench-scratch/daily-remote-synth10k-pull-rebase/remote.git

git runs

$ git pull --rebase -q origin main

grit runs

$ grit pull --rebase

checked first

before timing, git and grit were each run once and their results compared

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

git · median run 71 ms

run: git rebase

40 ms

run: git fetch

20 ms

run: git remote-http

16 ms

index: do_write_index ×7

15 ms

run: git-remote-http

15 ms

index: preload ×4

7.4 ms

run: git rev-list

7.1 ms

fetch: remote_refs

6.5 ms

unpack_trees: unpack_trees ×10

4.8 ms

unpack_trees: traverse_trees ×10

3.6 ms

merge: checkout ×3

3.3 ms

index: do_read_index ×7

3.0 ms

run: git merge-base

1.7 ms

cache-tree: prime_cache_tree

1.7 ms

run: git maintenance

1.4 ms

run: git notes

1.1 ms

index: refresh ×4

0.5 ms

merge: incore_nonrecursive ×3

0.3 ms

merge: process_entries ×9

0.2 ms

cache_tree: read ×7

0.1 ms

grit · median run 19 ms

grit.index.read ×2

1.3 ms

grit.pack.index

0.5 ms

grit.repository.open ×2

0.3 ms

grit.pack.delta.resolve

0.2 ms

grit.config.load ×4

0.1 ms

grit.pack.index.open ×11

0.1 ms

grit.diff.tree ×12

0.0 ms

Every day8 days

date	grit commit	git	grit	grit vs git	grit peak
2026-10-27	8dbc58e77	71 ms	19 ms	3.7× faster	24 MB
2026-10-26	c7cf2c443	105 ms	41 ms	2.5× faster	29 MB
2026-10-25	2824ad391	74 ms	24 ms	3.0× faster	23 MB
2026-10-24	157a05dde	79 ms	28 ms	2.8× faster	42 MB
2026-10-23	bddf92f86	70 ms	37 ms	1.9× faster	41 MB
2026-10-22	4c131b942	70 ms	38 ms	1.8× faster	40 MB
2026-10-21	d4844e92a	—	not run	—	—
2026-10-20	4754ad0b9	—	not run	—	—