grit://cooking/bench/merge/clean@synth-10k
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grit merge · clean @synth-10k

Merge branch vs git merge

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 merge/clean@synth-10k2026-10-27 · grit 8dbc58e77 · git version 2.43.0
toolmedianminmaxrunspeak memory
git98 ms94 ms106 ms2014 MB
grit56 ms55 ms68 ms2024 MB
grit is 1.7× fastermemory: 1.8× more
every timed run (log scale)
git
grit
43 ms133 ms
How it's measured
before each run
grit-bench prepare-merge --git git
git runs
$ git merge -q --no-edit topic
grit runs
$ grit merge topic
Where the time goesone extra traced run per tool, outside the timed runs
git · median run 98 ms
unpack_trees: unpack_trees ×3
81 ms
merge: checkout
80 ms
run: git stash
7.1 ms
index: preload ×3
3.8 ms
unpack_trees: traverse_trees ×3
2.6 ms
index: do_write_index
2.3 ms
run: git maintenance
1.5 ms
cache_tree: update
1.4 ms
index: do_read_index ×2
1.1 ms
index: refresh ×3
0.5 ms
merge: incore_recursive
0.4 ms
merge: process_entries ×3
0.2 ms
merge: collect_merge_info
0.1 ms
cache_tree: read ×2
0.1 ms
merge: traverse_trees
0.0 ms
merge: write_auto_merge
0.0 ms
cache_tree: write
0.0 ms
merge: merge_start
0.0 ms
merge: plist ×3
0.0 ms
merge: allocate/init
0.0 ms
grit · median run 56 ms
grit.index.write ×2
4.6 ms
grit.index.read ×3
2.4 ms
grit.diff.tree ×5
1.3 ms
grit.repository.open ×2
0.3 ms
grit.config.load ×4
0.1 ms
grit.pack.index.open
0.0 ms
Every day8 days
dategrit commitgitgritgrit vs gitgrit peak
2026-10-278dbc58e7798 ms56 ms1.7× faster24 MB
2026-10-26c7cf2c443202 ms134 ms1.5× faster25 MB
2026-10-252824ad391108 ms103 mspar24 MB
2026-10-24157a05dde108 ms74 ms1.5× faster25 MB
2026-10-23bddf92f8699 ms72 ms1.4× faster25 MB
2026-10-224c131b94299 ms76 ms1.3× faster24 MB
2026-10-21d4844e92a102 ms205 ms2.0× slower23 MB
2026-10-204754ad0b9112 ms270 ms2.4× slower23 MB