Mercurial > hg
view tests/test-issue4074.t @ 36146:29dd37a418aa
bdiff: write a native version of splitnewlines
./hg perfunidiff mercurial/manifest.py 0 --count 500 --profile before:
! wall 0.309280 comb 0.350000 user 0.290000 sys 0.060000 (best of 32)
./hg perfunidiff mercurial/manifest.py 0 --count 500 --profile after:
! wall 0.241572 comb 0.260000 user 0.240000 sys 0.020000 (best of 39)
so it's about 20% faster. I hate Python. I wish we could usefully
write this in Rust, but it doesn't look like that's realistic without
using the cpython crate, which I'd still like to avoid.
Differential Revision: https://phab.mercurial-scm.org/D1973
author | Augie Fackler <augie@google.com> |
---|---|
date | Thu, 25 Jan 2018 21:16:28 -0500 |
parents | 24849d53697d |
children | 57c671cf7a69 |
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#require no-pure A script to generate nasty diff worst-case scenarios: $ cat > s.py <<EOF > import random > for x in xrange(100000): > print > if random.randint(0, 100) >= 50: > x += 1 > print(hex(x)) > EOF $ hg init a $ cd a Check in a big file: $ $PYTHON ../s.py > a $ hg ci -qAm0 Modify it: $ $PYTHON ../s.py > a Time a check-in, should never take more than 10 seconds user time: $ hg ci --time -m1 time: real .* secs .user [0-9][.].* sys .* (re)