Rev 1578: Improve common_ancestor performance. in /home/robertc/source/baz/integration/

[Robert Collins]

------------------------------------------------------------
revno: 1578
revision-id: robertc at robertcollins.net-20060306035548-453e2432ec0e8caf
parent: pqm at pqm.ubuntu.com-20060306004926-6d7a10c990bc17d1
committer: Robert Collins <robertc at robertcollins.net>
branch nick: integration
timestamp: Mon 2006-03-06 14:55:48 +1100
message:
  Improve common_ancestor performance.
modified:
  bzrlib/repository.py           rev_storage.py-20051111201905-119e9401e46257e3
  bzrlib/revision.py             revision.py-20050309040759-e77802c08f3999d5
  bzrlib/tests/repository_implementations/test_repository.py test_repository.py-20060131092128-ad07f494f5c9d26c
  bzrlib/tests/test_revision.py  testrevision.py-20050804210559-46f5e1eb67b01289