~bzr-pqm/bzr/bzr.dev

#! /usr/bin/python

# Copyright (C) 2005 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Weave algorithms benchmark"""

import bzrlib.branch

from bzrlib.weave import Weave

from bzrlib.weavefile import write_weave

from bzrlib.progress import ProgressBar

from random import randrange, randint, seed

import tempfile

import hotshot, hotshot.stats

import sys

WEAVE_NAME = "bench.weave"

NUM_REVS = 2000

seed(0)

def build():

    pb = ProgressBar(show_eta=False)

    wf = Weave()

    lines = []

    parents = []

    for i in xrange(NUM_REVS):

        pb.update('building', i, NUM_REVS)

        for j in range(randint(0, 4)):

            o = randint(0, len(lines))

            lines.insert(o, "new in version %i\n" % i)

        for j in range(randint(0, 2)):

            if lines:

                del lines[randrange(0, len(lines))]

        rev_id = wf.add("%s" % i, parents, lines)

        parents = [rev_id]

    write_weave(wf, file(WEAVE_NAME, 'wb'))

#     parents = set()

#     revno = 1

#     rev_history = b.revision_history()

#     for rev_id in rev_history:

#         pb.update('converting inventory', revno, len(rev_history))

#         inv_xml = b.inventory_store[rev_id].readlines()

#         weave_id = wf.add(parents, inv_xml)

#         parents = set([weave_id])       # always just one parent

#         revno += 1

#     pb.update('write weave', None, None)

#     write_weave(wf, file(WEAVE_NAME, 'wb'))

    pb.clear()

def profileit(fn): 

    prof_f = tempfile.NamedTemporaryFile()

    prof = hotshot.Profile(prof_f.name)

    prof.runcall(fn) 

    prof.close()

    stats = hotshot.stats.load(prof_f.name)

    #stats.strip_dirs()

    stats.sort_stats('time')

    ## XXX: Might like to write to stderr or the trace file instead but

    ## print_stats seems hardcoded to stdout

    stats.print_stats(20)

if '-p' in sys.argv[1:]:

    opt_p = True

    sys.argv.remove('-p')

else:

    opt_p = False

if len(sys.argv) > 1:

    NUM_REVS = int(sys.argv[1])

if opt_p:

    profileit(build)

else:

    build()