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  • Committer: John Arbash Meinel
  • Date: 2009-10-12 15:55:26 UTC
  • mto: (4679.5.3 2.1-static-tuple-no-use)
  • mto: This revision was merged to the branch mainline in revision 4735.
  • Revision ID: john@arbash-meinel.com-20091012155526-b46tuz5cibebbnct
Change the _lookup function to use Quadratic Probing.

The main strength is that we get a bit of locality (collision resolution
looks quickly close to the location.)
The main weakness is that we don't use the upper bits of the hash to
induce divergence. So while we nicely handle collisions in neighboring
buckets (Quadratic means their resolution chains will diverge), if
two objects hash to the same bucket, their resolution chains are identical.

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bzrlib/add.py
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"""Helper functions for adding files to working trees."""
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import errno
 
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import os
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import sys
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import bzrlib.bzrdir
 
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import bzrlib.errors as errors
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import bzrlib.osutils
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from bzrlib.symbol_versioning import *
 
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from bzrlib.workingtree import WorkingTree
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class AddAction(object):