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  • Committer: wang
  • Date: 2006-10-29 13:41:32 UTC
  • mto: (2104.4.1 wang_65714)
  • mto: This revision was merged to the branch mainline in revision 2109.
  • Revision ID: wang@ubuntu-20061029134132-3d7f4216f20c4aef
Replace python's difflib by patiencediff because the worst case 
performance is cubic for difflib and people commiting large data 
files are often hurt by this. The worst case performance of patience is 
quadratic. Fix bug 65714.

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bzrlib/benchmarks/bench_bench.py
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# Copyright (C) 2006 by Canonical Ltd
 
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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 version 2 as published by
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# the Free Software Foundation.
 
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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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"""Tests for bzr benchmark utilities performance."""
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from bzrlib import (
 
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    osutils,
 
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    )
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from bzrlib.benchmarks import Benchmark
 
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from bzrlib.benchmarks.tree_creator.kernel_like import (
 
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    KernelLikeTreeCreator,
 
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    KernelLikeAddedTreeCreator,
 
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    KernelLikeCommittedTreeCreator,
 
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    )
 
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from bzrlib.tests import TestSkipped
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class MakeKernelLikeTreeBenchmark(Benchmark):
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        # on roberts machine: this originally took:  7372ms/ 7479ms
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        # with the LocalTransport._abspath call:     3730ms/ 3778ms
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        # with AtomicFile tuning:                    2888ms/ 2926ms
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        # switching to transport.append:             1468ms/ 2849ms
 
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        # switching to transport.append_bytes:       1468ms/ 2849ms
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        self.time(self.make_kernel_like_tree)
 
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    def test_02_make_kernel_like_tree(self):
 
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        """Hardlinking a kernel-like working tree should be ~1s"""
 
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        # make sure kernel_like_tree is cached
 
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        creator = KernelLikeTreeCreator(self, link_working=True)
 
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        if not creator.is_caching_enabled():
 
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            raise TestSkipped('caching is disabled')
 
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        creator.ensure_cached()
 
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        self.time(creator.create, root='bar')
 
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    def test_03_make_kernel_like_added_tree(self):
 
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        """Time the first creation of a kernel like added tree"""
 
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        creator = KernelLikeAddedTreeCreator(self)
 
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        creator.disable_cache()
 
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        self.time(creator.create, root='foo')
 
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    def test_04_make_kernel_like_added_tree(self):
 
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        """Time the second creation of a kernel like added tree 
 
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        (this should be a clone)
 
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        """
 
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        # make sure kernel_like_added_tree is cached
 
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        creator = KernelLikeAddedTreeCreator(self, link_working=True)
 
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        if not creator.is_caching_enabled():
 
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            # Caching is disabled, this test is meaningless
 
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            raise TestSkipped('caching is disabled')
 
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        creator.ensure_cached()
 
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        self.time(creator.create, root='bar')
 
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    def test_05_make_kernel_like_committed_tree(self):
 
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        """Time the first creation of a committed kernel like tree"""
 
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        creator = KernelLikeCommittedTreeCreator(self)
 
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        creator.disable_cache()
 
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        self.time(creator.create, root='foo')
 
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    def test_06_make_kernel_like_committed_tree(self):
 
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        """Time the second creation of a committed kernel like tree 
 
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        (this should be a clone)
 
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        """
 
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        creator = KernelLikeCommittedTreeCreator(self,
 
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                                                 link_working=True,
 
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                                                 link_bzr=False)
 
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        if not creator.is_caching_enabled():
 
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            # Caching is disabled, this test is meaningless
 
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            raise TestSkipped('caching is disabled')
 
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        creator.ensure_cached()
 
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        self.time(creator.create, root='bar')
 
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    def test_07_make_kernel_like_committed_tree_hardlink(self):
 
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        """Time the creation of a committed kernel like tree 
 
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        (this should also hardlink the .bzr/ directory)
 
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        """
 
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        creator = KernelLikeCommittedTreeCreator(self,
 
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                                                 link_working=True,
 
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                                                 link_bzr=True)
 
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        if not creator.is_caching_enabled():
 
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            # Caching is disabled, this test is meaningless
 
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            raise TestSkipped('caching is disabled')
 
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        creator.ensure_cached()
 
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        self.time(creator.create, root='bar')
 
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