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bzrlib/benchmarks/bench_bundle.py
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# Copyright (C) 2006 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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"""Tests for bzr bundle performance."""
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from cStringIO import StringIO
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import os
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import shutil
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from bzrlib import bzrdir
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from bzrlib.benchmarks import Benchmark
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from bzrlib.branch import Branch
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from bzrlib.bundle.apply_bundle import install_bundle
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from bzrlib.bundle.serializer import read_bundle, write_bundle
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from bzrlib.revision import NULL_REVISION
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from bzrlib.revisionspec import RevisionSpec
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from bzrlib.workingtree import WorkingTree
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class BundleBenchmark(Benchmark):
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    """Benchmarks for bzr bundle performance and bzr merge with a bundle."""
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    def test_create_bundle_known_kernel_like_tree(self):
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        """Create a bundle for a kernel sized tree with no ignored, unknowns,
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        or added and one commit.
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        """ 
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        self.make_kernel_like_committed_tree()
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        self.time(self.run_bzr, ['bundle', '--revision', '..-1'])
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    def test_create_bundle_many_commit_tree (self):
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        """Create a bundle for a tree with many commits but no changes.""" 
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        self.make_many_commit_tree()
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        self.time(self.run_bzr, ['bundle', '--revision', '..-1'])
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    def test_create_bundle_heavily_merged_tree(self):
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        """Create a bundle for a heavily merged tree.""" 
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        self.make_heavily_merged_tree()
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        self.time(self.run_bzr, ['bundle', '--revision', '..-1'])
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    def test_apply_bundle_known_kernel_like_tree(self):
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        """Create a bundle for a kernel sized tree with no ignored, unknowns,
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        or added and one commit.
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        """ 
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        tree = self.make_kernel_like_committed_tree('tree')
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        f = open('bundle', 'wb')
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        try:
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            write_bundle(tree.branch.repository, tree.last_revision(),
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                         NULL_REVISION, f)
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        finally:
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            f.close()
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        tree2 = self.make_branch_and_tree('branch_a')
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        os.chdir('branch_a')
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        self.time(self.run_bzr, ['merge', '../bundle'])
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class BundleLibraryLevelWriteBenchmark(Benchmark):
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    """ Benchmarks for the write_bundle library function. """
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    def _time_read_write(self):
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        branch, relpath = Branch.open_containing("a")
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        revision_history = branch.revision_history()
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        bundle_text = StringIO()
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        self.time(write_bundle, branch.repository, revision_history[-1],
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                  NULL_REVISION, bundle_text)
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        bundle_text.seek(0)
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        target_tree = self.make_branch_and_tree('b')
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        bundle = self.time(read_bundle, bundle_text)
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        self.time(install_bundle, target_tree.branch.repository, bundle)
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    def test_few_files_small_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(5, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 1, 1)
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        self._time_read_write()
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    def test_few_files_small_tree_100_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(5, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 100, 1)
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        self._time_read_write()
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    def test_few_files_moderate_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(100, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 1, 1)
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        self._time_read_write()
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    def test_few_files_moderate_tree_100_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(100, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 100, 1)
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        self._time_read_write()
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    def test_some_files_moderate_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(100, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:100], 1, 1)
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        self._time_read_write()
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    def test_few_files_big_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(1000, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 1, 1)
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        self._time_read_write()
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    def test_some_files_big_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(1000, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:100], 1, 1)
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        self._time_read_write()
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class BundleLibraryLevelInstallBenchmark(Benchmark):
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    """ Benchmarks for the install_bundle library function. """
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    def _time_read_write(self):
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        branch, relpath = Branch.open_containing("a")
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        revision_history = branch.revision_history()
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        bundle_text = StringIO()
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        write_bundle(branch.repository, revision_history[-1],
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                     NULL_REVISION, bundle_text)
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        bundle_text.seek(0)
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        target_tree = self.make_branch_and_tree('b')
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        bundle = self.time(read_bundle, bundle_text)
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        self.time(install_bundle, target_tree.branch.repository, bundle)
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    def test_few_files_small_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(5, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 1, 1)
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        self._time_read_write()
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    def test_few_files_small_tree_100_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(5, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 100, 1)
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        self._time_read_write()
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    def test_few_files_moderate_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(100, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 1, 1)
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        self._time_read_write()
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    def test_few_files_moderate_tree_100_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(100, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 100, 1)
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        self._time_read_write()
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    def test_some_files_moderate_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(100, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:100], 1, 1)
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        self._time_read_write()
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    def test_few_files_big_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(1000, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:5], 1, 1)
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        self._time_read_write()
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    def test_some_files_big_tree_1_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(1000, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:100], 1, 1)
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        self._time_read_write()
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if __name__ == '__main__':
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    # USE the following if you want to regenerate the above test functions 
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    for treesize, treesize_h in [(5, "small"), (100, "moderate"),
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                                 (1000, "big")]:
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        for bundlefiles, bundlefiles_h in [(5, "few"), (100, "some")]:
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            if bundlefiles > treesize:
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                continue
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            for num_revisions in [1, 100]:
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                if (num_revisions >= 100 and 
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                        (bundlefiles >= 100 or treesize >= 1000)):
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                    # Skip the 100x100x? tests.
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                    # And the 100x?x1000
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                    continue
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                code = """\
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    def test_%s_files_%s_tree_%s_revision(self):
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        os.mkdir("a")
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        tree, files = self.create_with_commits(%s, 1, directory_name="a")
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        self.commit_some_revisions(tree, files[:%s], %s, 1)
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        self._time_read_write()
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""" % (bundlefiles_h, treesize_h, num_revisions,
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       treesize, bundlefiles, num_revisions)
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                print code
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