Mercurial > hgsubversion
view tests/test_fetch_command_regexes.py @ 931:e1dbd9646d6a
svnwrap: use custom StringIO class in get_file()
The wrappers were calling ra.get_file() with a cStringIO object.
Empirically, svn 1.7.5 is writing 16kB blocks to the stream object, and
cStringIO reallocates its internal buffer and doubles its size whenever
it is filled. With large committed files this requires two large
memory blocks at the same time.
SimpleStringIO implements the mimimum StringIO interface used by
ra.get_file() but instead stores all the blocks and "join" them at the
end. It means more fragmentation but requires only one large block,
without overallocation. Also, 16kB blocks should be friendly to most
allocators.
In practice, this simple change let me convert a revision containing
multiple moderately large files, the largest being around 450MB, with a
32-bits Windows setup, python 2.7, swig svn 1.7.5, in stupid mode, while
it was previously aborting with "not enough memory". The same revision
still fails in replay mode.
| author | Patrick Mezard <patrick@mezard.eu> |
|---|---|
| date | Sun, 16 Sep 2012 19:31:49 +0200 |
| parents | 1d07e86f5797 |
| children | d741f536f23a |
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import unittest from hgsubversion import stupid two_empties = """Index: __init__.py =================================================================== Index: bar/__init__.py =================================================================== Index: bar/test_muhaha.py =================================================================== --- bar/test_muhaha.py (revision 0) +++ bar/test_muhaha.py (revision 1) @@ -0,0 +1,2 @@ + +blah blah blah, I'm a fake patch \ No newline at end of file """ binary_delta = """Index: trunk/functional_tests/doc_tests/test_doctest_fixtures/doctest_fixtures_fixtures.pyc =================================================================== Cannot display: file marked as a binary type. svn:mime-type = application/octet-stream Property changes on: trunk/functional_tests/doc_tests/test_doctest_fixtures/doctest_fixtures_fixtures.pyc ___________________________________________________________________ Added: svn:mime-type + application/octet-stream Index: trunk/functional_tests/doc_tests/test_doctest_fixtures/doctest_fixtures.rst =================================================================== """ special_delta = """Index: delta =================================================================== --- delta(revision 0) +++ delta(revision 9) @@ -0,0 +1 @@ +link alpha \ No newline at end of file Property changes on: delta ___________________________________________________________________ Name: svn:special + * """ class RegexTests(unittest.TestCase): def test_empty_file_re(self): changed = stupid.parsediff(two_empties) self.assertEqual(3, len(changed)) self.assertEqual('__init__.py', changed[0].name) self.assert_(changed[0].isempty()) self.assertEqual('bar/__init__.py', changed[1].name) self.assert_(changed[1].isempty()) self.assertEqual('bar/test_muhaha.py', changed[2].name) self.assert_(not changed[2].isempty()) def test_any_matches_just_one(self): pat = '''Index: trunk/django/contrib/admin/urls/__init__.py =================================================================== ''' changed = stupid.parsediff(pat) self.assertEqual(['trunk/django/contrib/admin/urls/__init__.py'], [f.name for f in changed]) def test_special_re(self): changed = stupid.parsediff(special_delta) self.assertEqual(1, len(changed)) self.assert_(changed[0].symlink) def test_any_file_re(self): changed = stupid.parsediff(two_empties) self.assertEqual(['__init__.py', 'bar/__init__.py', 'bar/test_muhaha.py'], [f.name for f in changed]) def test_binary_file_re(self): changed = stupid.parsediff(binary_delta) binaries = [f.name for f in changed if f.binary] self.assertEqual(['trunk/functional_tests/doc_tests/test_doctest_fixtures/doctest_fixtures_fixtures.pyc'], binaries) def test_diff16(self): data = """Index: d3/d =================================================================== --- d3/d (revision 0) +++ d3/d (revision 6) @@ -0,0 +1 @@ +d Property changes on: d3 ___________________________________________________________________ Added: svn:externals + ^/trunk/common/ext ext3 Property changes on: . ___________________________________________________________________ Added: svn:mergeinfo Merged /branches/branch:r4-5 """ changed = stupid.parsediff(data) self.assertEqual(['d3/d', 'd3', '.'], [f.name for f in changed]) data = """Property changes on: empty1 ___________________________________________________________________ Deleted: svn:executable - * Property changes on: empty2 ___________________________________________________________________ Added: svn:executable + * Property changes on: binary1 ___________________________________________________________________ Deleted: svn:executable - * Property changes on: text1 ___________________________________________________________________ Deleted: svn:executable - * Property changes on: binary2 ___________________________________________________________________ Added: svn:executable + * Property changes on: text2 ___________________________________________________________________ Added: svn:executable + * """ changed = stupid.parsediff(data) self.assertEqual(['empty1', 'empty2', 'binary1', 'text1', 'binary2', 'text2'], [f.name for f in changed]) def suite(): return unittest.TestLoader().loadTestsFromTestCase(RegexTests)