Mercurial > hg
view tests/test-1102.t @ 16943:8d08a28aa63e
matcher: use re2 bindings if available
There are two sets of Python re2 bindings available on the internet;
this code works with both.
Using re2 can greatly improve "hg status" performance when a .hgignore
file becomes even modestly complex.
Example: "hg status" on a clean tree with 134K files, where "hg
debugignore" reports a regexp 4256 bytes in size.
no .hgignore: 1.76 sec
Python re: 2.79
re2: 1.82
The overhead of regexp matching drops from 1.03 seconds with stock
re to 0.06 with re2.
(For comparison, a git repo with the same contents and .gitignore
file runs "git status -s" in 1.71 seconds, i.e. only slightly faster
than hg with re2.)
author | Bryan O'Sullivan <bryano@fb.com> |
---|---|
date | Fri, 01 Jun 2012 15:26:20 -0700 |
parents | f2719b387380 |
children |
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$ rm -rf a $ hg init a $ cd a $ echo a > a $ hg ci -Am0 adding a $ hg tag t1 # 1 $ hg tag --remove t1 # 2 $ hg co 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg tag -f -r0 t1 $ hg tags tip 3:a49829c4fc11 t1 0:f7b1eb17ad24 $ cd ..