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Viewing changes to bzrlib/benchmarks/bench_bench.py

Add bzrlib.pyutils, which has get_named_object, a wrapper around __import__.

This is used to replace various ad hoc implementations of the same logic,
notably the version used in registry's _LazyObjectGetter which had a bug when
getting a module without also getting a member.  And of course, this new
function has unit tests, unlike the replaced code.

This also adds a KnownHooksRegistry subclass to provide a more natural home for
some other logic.

I'm not thrilled about the name of the new module or the new functions, but it's
hard to think of good names for such generic functionality.

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bzrlib/benchmarks/bench_bench.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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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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    """Benchmark creating benchmark trees."""
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    def test_make_kernel_like_tree(self):
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        """Making a kernel sized tree should be ~ 5seconds on modern disk."""
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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_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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