Mercurial > hgsubversion
view tests/fixtures/renamedproject.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 | 942f198b8ff5 |
| children |
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SVN-fs-dump-format-version: 2 UUID: 169a5fe1-3c9f-4eef-ad86-f932c54e53dc Revision-number: 0 Prop-content-length: 56 Content-length: 56 K 8 svn:date V 27 2009-05-01T17:53:40.957980Z PROPS-END Revision-number: 1 Prop-content-length: 114 Content-length: 114 K 7 svn:log V 12 init project K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.129010Z PROPS-END Node-path: project-orig Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: project-orig/a Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3 Text-content-sha1: 3f786850e387550fdab836ed7e6dc881de23001b Content-length: 12 PROPS-END a Node-path: project-orig/b Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 3b5d5c3712955042212316173ccf37be Text-content-sha1: 89e6c98d92887913cadf06b2adb97f26cde4849b Content-length: 12 PROPS-END b Node-path: project-orig/c Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 2cd6ee2c70b0bde53fbe6cac3c8b8bb1 Text-content-sha1: 2b66fd261ee5c6cfc8de7fa466bab600bcfe4f69 Content-length: 12 PROPS-END c Node-path: project-orig/d Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: project-orig/d/a Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3 Text-content-sha1: 3f786850e387550fdab836ed7e6dc881de23001b Content-length: 12 PROPS-END a Revision-number: 2 Prop-content-length: 113 Content-length: 113 K 7 svn:log V 11 init branch K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.193926Z PROPS-END Node-path: project-branch Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: project-branch/a Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3 Text-content-sha1: 3f786850e387550fdab836ed7e6dc881de23001b Content-length: 12 PROPS-END a Node-path: project-branch/b Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 3b5d5c3712955042212316173ccf37be Text-content-sha1: 89e6c98d92887913cadf06b2adb97f26cde4849b Content-length: 12 PROPS-END b Revision-number: 3 Prop-content-length: 130 Content-length: 130 K 7 svn:log V 28 create new project hierarchy K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.236131Z PROPS-END Node-path: project Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Revision-number: 4 Prop-content-length: 119 Content-length: 119 K 7 svn:log V 17 rename as project K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.288164Z PROPS-END Node-path: project/project Node-kind: dir Node-action: add Node-copyfrom-rev: 3 Node-copyfrom-path: project-orig Node-path: project-orig Node-action: delete Revision-number: 5 Prop-content-length: 119 Content-length: 119 K 7 svn:log V 17 rename as project K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.335332Z PROPS-END Node-path: project/trunk Node-kind: dir Node-action: add Node-copyfrom-rev: 4 Node-copyfrom-path: project/project Node-path: project/project Node-action: delete Revision-number: 6 Prop-content-length: 119 Content-length: 119 K 7 svn:log V 17 add branches root K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.377684Z PROPS-END Node-path: project/branches Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Revision-number: 7 Prop-content-length: 130 Content-length: 130 K 7 svn:log V 28 incorrect move of the branch K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.426928Z PROPS-END Node-path: project/misplaced Node-kind: dir Node-action: add Node-copyfrom-rev: 6 Node-copyfrom-path: project-branch Node-path: project-branch Node-action: delete Revision-number: 8 Prop-content-length: 120 Content-length: 120 K 7 svn:log V 18 move of the branch K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:41.478644Z PROPS-END Node-path: project/branches/branch Node-kind: dir Node-action: add Node-copyfrom-rev: 7 Node-copyfrom-path: project/misplaced Node-path: project/misplaced Node-action: delete Revision-number: 9 Prop-content-length: 109 Content-length: 109 K 7 svn:log V 8 change a K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:42.078428Z PROPS-END Node-path: project/trunk/a Node-kind: file Node-action: change Text-content-length: 4 Text-content-md5: 0d227f1abf8c2932d342e9b99cc957eb Text-content-sha1: d7c8127a20a396cff08af086a1c695b0636f0c29 Content-length: 4 a a Revision-number: 10 Prop-content-length: 123 Content-length: 123 K 7 svn:log V 21 change files in trunk K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:43.109915Z PROPS-END Node-path: project/trunk/a Node-kind: file Node-action: change Text-content-length: 6 Text-content-md5: 7d4ebf8f298d22fc349a91725b00af1c Text-content-sha1: 92f31bc48f52339253fce6cad9f2f0c95b302f7e Content-length: 6 a a a Node-path: project/trunk/b Node-kind: file Node-action: change Text-content-length: 4 Text-content-md5: 06ac26ed8b614fc0b141e4542aa067c2 Text-content-sha1: f6980469e74f7125178e88ec571e06fe6ce86e95 Content-length: 4 b b Node-path: project/trunk/d/a Node-kind: file Node-action: change Text-content-length: 4 Text-content-md5: 0d227f1abf8c2932d342e9b99cc957eb Text-content-sha1: d7c8127a20a396cff08af086a1c695b0636f0c29 Content-length: 4 a a Node-path: project/trunk/c Node-action: delete Revision-number: 11 Prop-content-length: 120 Content-length: 120 K 7 svn:log V 18 change a in branch K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:44.100553Z PROPS-END Node-path: project/branches/branch/a Node-kind: file Node-action: change Text-content-length: 4 Text-content-md5: 0d227f1abf8c2932d342e9b99cc957eb Text-content-sha1: d7c8127a20a396cff08af086a1c695b0636f0c29 Content-length: 4 a a Node-path: project/branches/branch/b Node-action: delete Revision-number: 12 Prop-content-length: 134 Content-length: 134 K 7 svn:log V 32 init fake trunk for rebuild_meta K 10 svn:author V 7 pmezard K 8 svn:date V 27 2009-05-01T17:53:45.089483Z PROPS-END Node-path: trunk Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: trunk/a Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3 Text-content-sha1: 3f786850e387550fdab836ed7e6dc881de23001b Content-length: 12 PROPS-END a Node-path: trunk/b Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 3b5d5c3712955042212316173ccf37be Text-content-sha1: 89e6c98d92887913cadf06b2adb97f26cde4849b Content-length: 12 PROPS-END b Node-path: trunk/c Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 2cd6ee2c70b0bde53fbe6cac3c8b8bb1 Text-content-sha1: 2b66fd261ee5c6cfc8de7fa466bab600bcfe4f69 Content-length: 12 PROPS-END c Node-path: trunk/d Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: trunk/d/a Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3 Text-content-sha1: 3f786850e387550fdab836ed7e6dc881de23001b Content-length: 12 PROPS-END a