Mercurial > hg
diff mercurial/manifest.py @ 20075:f8737bce736a
manifest: increase lrucache from 3 to 4
During a commit amend there are 4 manifests being handled:
- original commit
- temporary commit
- amended commit
- merge base
This causes a manifest cache miss which hurts perf on large repos. On a large
repo, this fix causes amend to go from 6 seconds to 5.5 seconds.
| author | Durham Goode <durham@fb.com> |
|---|---|
| date | Mon, 11 Nov 2013 16:35:12 -0800 |
| parents | 40b4b1f9b7a0 |
| children | 090dcaaf3fff |
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--- a/mercurial/manifest.py Mon Nov 11 16:42:49 2013 -0800 +++ b/mercurial/manifest.py Mon Nov 11 16:35:12 2013 -0800 @@ -30,8 +30,9 @@ class manifest(revlog.revlog): def __init__(self, opener): - # we expect to deal with not more than three revs at a time in merge - self._mancache = util.lrucachedict(3) + # we expect to deal with not more than four revs at a time, + # during a commit --amend + self._mancache = util.lrucachedict(4) revlog.revlog.__init__(self, opener, "00manifest.i") def parse(self, lines):