~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Tests for bzr osutils functions performance."""

from bzrlib.benchmarks import Benchmark

import bzrlib.osutils as osutils

class WalkDirsBenchmark(Benchmark):

    """Benchmarks for `bzrlib.osutils.walkdirs`"""

    def test_walkdirs_kernel_like_tree(self):

        """Walking a kernel sized tree is fast!(150ms)."""

        self.make_kernel_like_tree(link_working=True)

        # on roberts machine: this originally took:  157ms/4177ms

        # plain os.walk takes 213ms on this tree

        # with the pyrex readdir module:              77ms/5423ms

        def dowalk():

            for dirblock in osutils.walkdirs('.'):

                if dirblock[0][1] == '.bzr':

                    del dirblock[0]

        self.time(dowalk)