view tests/fixtures/no-author.svndump @ 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 c2b9e08ecf10
children
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SVN-fs-dump-format-version: 2

UUID: df2126f7-00ab-4d49-b42c-7e981dde0bcf

Revision-number: 0
Prop-content-length: 56
Content-length: 56

K 8
svn:date
V 27
2008-10-07T22:49:12.059692Z
PROPS-END

Revision-number: 1
Prop-content-length: 85
Content-length: 85

K 7
svn:log
V 11
Empty dirs.
K 8
svn:date
V 27
2008-10-07T22:49:41.118037Z
PROPS-END

Node-path: branches
Node-kind: dir
Node-action: add
Prop-content-length: 10
Content-length: 10

PROPS-END


Node-path: tags
Node-kind: dir
Node-action: add
Prop-content-length: 10
Content-length: 10

PROPS-END


Node-path: trunk
Node-kind: dir
Node-action: add
Prop-content-length: 10
Content-length: 10

PROPS-END


Revision-number: 2
Prop-content-length: 82
Content-length: 82

K 7
svn:log
V 9
Add alpha
K 8
svn:date
V 27
2008-10-07T23:23:02.991743Z
PROPS-END

Node-path: trunk/alpha
Node-kind: file
Node-action: add
Prop-content-length: 10
Text-content-length: 12
Text-content-md5: 3c72ebf8bbd7fa88b1fdcee5398b5a17
Text-content-sha1: f552a50b53177d35b29a4a0ab1cece918b5b5e9b
Content-length: 22

PROPS-END
file: alpha