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Viewing changes to bzrlib/benchmarks/bench_xml.py

  • Committer: John Arbash Meinel
  • Date: 2006-08-16 22:05:26 UTC
  • mto: This revision was merged to the branch mainline in revision 1942.
  • Revision ID: john@arbash-meinel.com-20060816220526-9e9e34ad909f252d
Document why we use try/except rather than if None

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bzrlib/benchmarks/bench_xml.py
 
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# Copyright (C) 2006 by 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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#
 
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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 xml serialization performance."""
 
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from bzrlib import (
 
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    cache_utf8,
 
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    xml5,
 
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    )
 
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from bzrlib.benchmarks import Benchmark
 
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class BenchXMLSerializer(Benchmark):
 
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    def test_serialize_to_string_kernel_like_inventory(self):
 
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        # On jam's machine, ElementTree serializer took: 2161ms/13487ms
 
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        #                      with Robert's serializer:  631ms/10770ms
 
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        #                      with Entity escaper:       487ms/11636ms
 
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        #           caching Entity escaper, empty cache:  448ms/ 9489ms
 
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        #           caching Entity escaper, full cache:   375ms/ 9489ms
 
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        #                      passing around function:   406ms/ 8942ms
 
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        #              cached, passing around function:   328ms/11248ms
 
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        #                      removing extra function:   354ms/ 8942ms
 
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        #              cached, removing extra function:   275ms/11248ms
 
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        #                          no cache, real utf8:   363ms/11697ms
 
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        #                            cached, real utf8:   272ms/12827ms
 
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        # Really all we want is a real inventory
 
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        tree = self.make_kernel_like_committed_tree('.', link_bzr=True)
 
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        xml5._clear_cache()
 
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        # We want a real tree with lots of file ids and sha strings, etc.
 
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        self.time(xml5.serializer_v5.write_inventory_to_string,
 
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                  tree.basis_tree().inventory)
 
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    def test_serialize_kernel_like_inventory(self):
 
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        # Really all we want is a real inventory
 
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        tree = self.make_kernel_like_committed_tree('.', link_bzr=True)
 
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        xml5._clear_cache()
 
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        f = open('kernel-like-inventory', 'wb')
 
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        try:
 
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            # We want a real tree with lots of file ids and sha strings, etc.
 
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            self.time(xml5.serializer_v5.write_inventory,
 
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                      tree.basis_tree().inventory, f)
 
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        finally:
 
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            f.close()
 
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    def test_serialize_to_string_cached_kernel_like_inventory(self):
 
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        tree = self.make_kernel_like_committed_tree('.', link_bzr=True)
 
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        xml5._clear_cache()
 
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        # We want a real tree with lots of file ids and sha strings, etc.
 
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        inv = tree.basis_tree().inventory
 
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        xml5.serializer_v5.write_inventory_to_string(inv)
 
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        self.time(xml5.serializer_v5.write_inventory_to_string, inv)
 
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    def test_serialize_to_string_no_cache_kernel_like_inventory(self):
 
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        tree = self.make_kernel_like_committed_tree('.', link_bzr=True)
 
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        cache_utf8.clear_encoding_cache()
 
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        xml5._clear_cache()
 
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        # We want a real tree with lots of file ids and sha strings, etc.
 
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        inv = tree.basis_tree().inventory
 
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        self.time(xml5.serializer_v5.write_inventory_to_string, inv)
 
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