# Copyright (C) 2007 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
"""Benchmarks for pack performance"""
import os
from bzrlib import (
pack,
)
from bzrlib.benchmarks import Benchmark
class BenchPack(Benchmark):
"""Benchmark pack performance."""
def test_insert_one_gig_1k_chunks_no_names_disk(self):
# test real disk writing of many small chunks.
# useful for testing whether buffer sizes are right
transport = self.get_transport()
stream = transport.open_write_stream('pack.pack')
writer = pack.ContainerWriter(stream.write)
self.write_1_gig(writer)
stream.close()
def test_insert_one_gig_1k_chunks_no_names_null(self):
# write to dev/null so we test the pack processing.
transport = self.get_transport()
dev_null = open('/dev/null', 'wb')
writer = pack.ContainerWriter(dev_null.write)
self.write_1_gig(writer)
dev_null.close()
def write_1_gig(self, writer):
one_k = "A" * 1024
writer.begin()
def write_1g():
for hunk in xrange(1024 * 1024):
writer.add_bytes_record(one_k, [])
self.time(write_1g)
writer.end()
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