view hg @ 27558:b5b54825de6b

pull: make a single call to obsstore.add (issue5006)

Prior to this, a pull of 90k markers (already known locally!) was
making about 2000 calls to obsstore.add, which was repeatedly building
a full set of known markers (in addition to other transaction
overhead). This quadratic behavior accounted for about 50 seconds of a
70 second no-op pull. After this change, we're down to 20 seconds.

While it would seem simplest to just cache the known set for
obsstore.add, this would also introduce issues of correct cache invalidation.
The extra pointless transaction overhead would also remain.

#!/usr/bin/env python
#
# mercurial - scalable distributed SCM
#
# Copyright 2005-2007 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import os
import sys

if os.environ.get('HGUNICODEPEDANTRY', False):
    reload(sys)
    sys.setdefaultencoding("undefined")


libdir = '@LIBDIR@'

if libdir != '@' 'LIBDIR' '@':
    if not os.path.isabs(libdir):
        libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
                              libdir)
        libdir = os.path.abspath(libdir)
    sys.path.insert(0, libdir)

# enable importing on demand to reduce startup time
try:
    from mercurial import demandimport; demandimport.enable()
except ImportError:
    import sys
    sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
                     ' '.join(sys.path))
    sys.stderr.write("(check your install and PYTHONPATH)\n")
    sys.exit(-1)

import mercurial.util
import mercurial.dispatch

for fp in (sys.stdin, sys.stdout, sys.stderr):
    mercurial.util.setbinary(fp)

mercurial.dispatch.run()