Mercurial > hgsubversion
changeset 1294:9a722b5246df
maps: cache hashes() for the revmap
This fix caches the hashes() results for revision map. For big
repos the revision map can be huge (>30MB) and this fix is saving us
some time (~0.7s per every subsequent call) by avoiding reversing rev
dictionary multiple times.
| author | Mateusz Kwapich <mitrandir@fb.com> |
|---|---|
| date | Fri, 12 Dec 2014 16:32:34 -0800 |
| parents | 9e85feb93984 |
| children | 9d5cff8d7f67 |
| files | hgsubversion/maps.py |
| diffstat | 1 files changed, 6 insertions(+), 1 deletions(-) [+] |
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--- a/hgsubversion/maps.py +++ b/hgsubversion/maps.py @@ -194,6 +194,7 @@ class RevMap(dict): def __init__(self, meta): dict.__init__(self) self.meta = meta + self._hashes = None if os.path.isfile(self.meta.revmap_file): self._load() @@ -201,7 +202,9 @@ class RevMap(dict): self._write() def hashes(self): - return dict((v, k) for (k, v) in self.iteritems()) + if self._hashes is None: + self._hashes = dict((v, k) for (k, v) in self.iteritems()) + return self._hashes def branchedits(self, branch, rev): check = lambda x: x[0][1] == branch and x[0][0] < rev.revnum @@ -256,6 +259,8 @@ class RevMap(dict): if revnum < self.meta.firstpulled or not self.meta.firstpulled: self.meta.firstpulled = revnum dict.__setitem__(self, (revnum, branch), ha) + if self._hashes is not None: + self._hashes[ha] = (revnum, branch) class FileMap(object):