Mercurial > public > mercurial-scm > hg
diff mercurial/manifest.py @ 24033:ed5e8a9598ce
manifest: make lru size configurable
On machines with lots of ram, it's beneficial to increase the lru size of the
manifest cache. On a large repo, configuring the lru to be size 10 can shave a
large rebase (~12 commits) down from 95s to 70s.
| author | Durham Goode <durham@fb.com> |
|---|---|
| date | Fri, 23 Jan 2015 17:06:03 -0800 |
| parents | 399a8403cb54 |
| children | dd8c891dd09a |
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--- a/mercurial/manifest.py Wed Feb 04 11:38:30 2015 -0500 +++ b/mercurial/manifest.py Fri Jan 23 17:06:03 2015 -0800 @@ -220,9 +220,14 @@ class manifest(revlog.revlog): def __init__(self, opener): - # we expect to deal with not more than four revs at a time, - # during a commit --amend - self._mancache = util.lrucachedict(4) + # During normal operations, we expect to deal with not more than four + # revs at a time (such as during commit --amend). When rebasing large + # stacks of commits, the number can go up, hence the config knob below. + cachesize = 4 + opts = getattr(opener, 'options', None) + if opts is not None: + cachesize = opts.get('manifestcachesize', cachesize) + self._mancache = util.lrucachedict(cachesize) revlog.revlog.__init__(self, opener, "00manifest.i") def readdelta(self, node):