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can get with::
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  svn co http://codespeak.net/svn/user/arigo/hack/misc/lsprof
 
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Profiling locks
 
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---------------
 
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Bazaar can log when locks are taken or released, which can help in
 
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identifying unnecessary lock traffic.  This is activated by the ``-Dlock``
 
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global option.
 
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This writes messages into ~/.bzr.log.
 
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At present this only logs actions relating to the on-disk lockdir.  It 
 
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doesn't describe actions on in-memory lock counters, or OS locks (which
 
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are used for dirstate.)