Mercurial > hg-stable
changeset 4373:abeb3edb2b4e
dirstate: make parents() faster.
This allows localrepository.status() to avoid reading all but the
first 40 bytes of the dirstate in the common case of running "hg
status".
| author | Bryan O'Sullivan <bos@serpentine.com> |
|---|---|
| date | Tue, 24 Apr 2007 11:46:15 -0700 |
| parents | 4ddc6d374265 |
| children | 9edc2d6f7c10 |
| files | mercurial/dirstate.py |
| diffstat | 1 files changed, 24 insertions(+), 2 deletions(-) [+] |
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line diff
--- a/mercurial/dirstate.py Tue Apr 24 11:05:39 2007 -0700 +++ b/mercurial/dirstate.py Tue Apr 24 11:46:15 2007 -0700 @@ -20,6 +20,7 @@ self.dirty = 0 self.ui = ui self.map = None + self.fp = None self.pl = None self.dirs = None self.copymap = {} @@ -133,12 +134,28 @@ self.lazyread() return self[key] + _unknown = ('?', 0, 0, 0) + + def get(self, key): + try: + return self[key] + except KeyError: + return self._unknown + def __contains__(self, key): self.lazyread() return key in self.map def parents(self): - self.lazyread() + if self.pl is None: + self.pl = [nullid, nullid] + try: + self.fp = self.opener('dirstate') + st = self.fp.read(40) + if len(st) == 40: + self.pl = st[:20], st[20:40] + except IOError, err: + if err.errno != errno.ENOENT: raise return self.pl def branch(self): @@ -202,7 +219,12 @@ self.map = {} self.pl = [nullid, nullid] try: - st = self.opener("dirstate").read() + if self.fp: + self.fp.seek(0) + st = self.fp.read() + self.fp = None + else: + st = self.opener("dirstate").read() if st: self.parse(st) except IOError, err: