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branch heads: optimise computation of branch head cache (issue1734)

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The previous branch heads cache implementation iterated all ancestors
for each new revision in the repository, causing a massive slowdown on
cloning larger repositories.
This commit is contained in:
Henrik Stuart 2009-07-13 20:19:17 +02:00
parent afad34fc2e
commit 180b39fb48
1 changed files with 2 additions and 3 deletions
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5
mercurial/localrepo.py
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@ -473,9 +473,8 @@ class localrepository(repo.repository):
latest = newnodes.pop()
if latest not in bheads:
continue
reachable = set()
for bh in bheads:
reachable |= self.changelog.reachable(latest, bh)
minbhrev = self[min([self[bh].rev() for bh in bheads])].node()
reachable = self.changelog.reachable(latest, minbhrev)
bheads = [b for b in bheads if b not in reachable]
newbheads.insert(0, latest)
bheads.extend(newbheads)