I have spotted the biggest bottleneck in "bdiff.c". Actually it was
pretty easy to find after I recompiled the python interpreter and
mercurial for profiling.
In "bdiff.c" function "equatelines" allocates the minimum hash table
size, which can lead to tons of collisions. I introduced an
"overcommit" factor of 16, this is, I allocate 16 times more memory
than the minimum value. Overcommiting 128 times does not improve the
performance over the 16-times case.
# remoterepo - remote repository proxy classes for mercurial
#
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import repo
class remoterepository(repo.repository):
def dev(self):
return -1
def local(self):
return False
class remotelock(object):
def __init__(self, repo):
self.repo = repo
def release(self):
self.repo.unlock()
self.repo = None
def __del__(self):
if self.repo:
self.release()