Mercurial > hgsubversion
annotate tests/fixtures/renametagdir.sh @ 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 | d380e7e4175a |
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1 #!/bin/sh |
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2 # inspired by Python r62868 |
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3 |
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4 mkdir temp |
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5 cd temp |
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6 svnadmin create repo |
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7 svn co file://`pwd`/repo wc |
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8 export REPO=file://`pwd`/repo |
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Patrick Mezard <pmezard@gmail.com>
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9 cd wc |
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Patrick Mezard <pmezard@gmail.com>
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10 mkdir branches trunk tags |
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Patrick Mezard <pmezard@gmail.com>
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11 svn add * |
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12 svn ci -m 'btt' |
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13 |
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14 echo a > trunk/a |
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15 svn add trunk/a |
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Patrick Mezard <pmezard@gmail.com>
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16 svn ci -m 'Add file.' |
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Patrick Mezard <pmezard@gmail.com>
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17 svn up |
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18 |
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19 svn cp trunk branches/test |
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20 svn ci -m 'Branch.' |
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Patrick Mezard <pmezard@gmail.com>
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21 svn up |
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22 |
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23 cd .. |
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24 svn cp -m 'First tag.' $REPO/branches/test@3 $REPO/tags/test-0.1 |
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25 svn cp -m 'Weird tag.' $REPO/branches/test@3 $REPO/tags/test-0.1/test |
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26 svn mv -m 'Fix tag pt 1.' $REPO/tags/test-0.1/test $REPO/tags/test-0.1-real |
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27 svn rm -m 'Remove weird.' $REPO/tags/test-0.1 |
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28 svn mv -m 'Fix tag pt 2.' $REPO/tags/test-0.1-real $REPO/tags/test-0.1 |
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29 |
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30 cd .. |
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31 svnadmin dump temp/repo > renametagdir.svndump |
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32 echo |
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Patrick Mezard <pmezard@gmail.com>
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33 echo 'Complete.' |
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34 echo 'You probably want to clean up temp now.' |
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35 echo 'Dump in renametagdir.svndump' |
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Patrick Mezard <pmezard@gmail.com>
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36 exit 0 |