Mercurial > public > mercurial-scm > hg-stable
diff mercurial/dirstate.py @ 16955:92e1c64ba0d4
parsers: add a C function to pack the dirstate
This is about 9 times faster than the Python dirstate packing code.
The relatively small speedup is due to the poor locality and memory
access patterns caused by traversing dicts and other boxed Python
values.
| author | Bryan O'Sullivan <bryano@fb.com> |
|---|---|
| date | Wed, 30 May 2012 12:55:33 -0700 |
| parents | 67964cda8701 |
| children | c2016bae3b97 |
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--- a/mercurial/dirstate.py Fri Jun 08 05:31:28 2012 +0300 +++ b/mercurial/dirstate.py Wed May 30 12:55:33 2012 -0700 @@ -498,12 +498,24 @@ return st = self._opener("dirstate", "w", atomictemp=True) + def finish(s): + st.write(s) + st.close() + self._lastnormaltime = 0 + self._dirty = self._dirtypl = False + # use the modification time of the newly created temporary file as the # filesystem's notion of 'now' - now = int(util.fstat(st).st_mtime) + now = util.fstat(st).st_mtime + copymap = self._copymap + try: + finish(parsers.pack_dirstate(self._map, copymap, self._pl, now)) + return + except AttributeError: + pass + now = int(now) cs = cStringIO.StringIO() - copymap = self._copymap pack = struct.pack write = cs.write write("".join(self._pl)) @@ -526,10 +538,7 @@ e = pack(_format, e[0], e[1], e[2], e[3], len(f)) write(e) write(f) - st.write(cs.getvalue()) - st.close() - self._lastnormaltime = 0 - self._dirty = self._dirtypl = False + finish(cs.getvalue()) def _dirignore(self, f): if f == '.':