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Improve repo sync performance by avoid git forks

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By resolving the current HEAD and the manifest revision using pure
Python, we can in the common case of "no changes" avoid a lot of
git operations and directly jump out of the local sync method.

This reduces the no-op `repo sync -l` time for Android's 114 projects
from more than 6s to under 0.8s.

Signed-off-by: Shawn O. Pearce <sop@google.com>
This commit is contained in:
Shawn O. Pearce
2009-04-17 20:58:02 -07:00
parent d237b69865
commit fbcde472ca
2 changed files with 60 additions and 15 deletions
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11
git_refs.py
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@ -41,6 +41,17 @@ class GitRefs(object):
except KeyError:
return ''
def deleted(self, name):
if self._phyref is not None:
if name in self._phyref:
del self._phyref[name]
if name in self._symref:
del self._symref[name]
if name in self._mtime:
del self._mtime[name]
def _NeedUpdate(self):
for name, mtime in self._mtime.iteritems():
try: