Mercurial > hgsubversion
annotate .hgtags @ 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> |
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date | Sun, 16 Sep 2012 19:31:49 +0200 |
parents | 78ffbe411695 |
children | 109c412ecf12 |
rev | line source |
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554
d2d5c09b33d0
Added tag 1.0 for changeset 97f2079e3778
Augie Fackler <durin42@gmail.com>
parents:
diff
changeset
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1 97f2079e3778511944ffb6a662520580650a3993 1.0 |
564
7bd457ec4e5e
Added tag 1.0.1 for changeset 09c016174e33
Augie Fackler <durin42@gmail.com>
parents:
554
diff
changeset
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2 09c016174e332eceda015d3f43d96d7e0228acf3 1.0.1 |
592
b4c3afc95420
Added tag 1.1 for changeset 4359ddd73b00
Augie Fackler <durin42@gmail.com>
parents:
564
diff
changeset
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3 4359ddd73b009fbb356c52ea5d99cba25222ee7a 1.1 |
627
faba8e636960
Added tag 1.1.1 for changeset 8e621dbb82d4
Augie Fackler <durin42@gmail.com>
parents:
592
diff
changeset
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4 8e621dbb82d4363a85317638ad237e2817c56347 1.1.1 |
631
493023041e74
Added tag 1.1.2 for changeset 093ae2915b45
Augie Fackler <durin42@gmail.com>
parents:
627
diff
changeset
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5 093ae2915b452539b44390ee4ea14987484e1eee 1.1.2 |
738
2ddb95cd36dd
Added tag 1.2 for changeset 708234ad6c97
Augie Fackler <durin42@gmail.com>
parents:
631
diff
changeset
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6 708234ad6c97fb52417e0b46a86c8373e25123a5 1.2 |
788
836aa282f1f8
Added tag 1.2.1 for changeset 4bbc6bf947f5
Augie Fackler <durin42@gmail.com>
parents:
738
diff
changeset
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7 4bbc6bf947f56a92e95a04a27b94a9f72d5482d7 1.2.1 |
838
efc86b40e915
Added tag 1.3 for changeset 0cbf9fd89672
Augie Fackler <durin42@gmail.com>
parents:
788
diff
changeset
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8 0cbf9fd89672e73165e1bb4db1ec8f7f65b95c94 1.3 |
883
78ffbe411695
Added tag 1.4 for changeset 07234759a3f7
Augie Fackler <raf@durin42.com>
parents:
838
diff
changeset
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9 07234759a3f750029ccaa001837d42fa12dd33ee 1.4 |