Rev 4389: Change VF.annotate to use the new KnownGraph code. in http://bazaar.launchpad.net/~jameinel/bzr/1.16-better_heads

[John Arbash Meinel]

At http://bazaar.launchpad.net/~jameinel/bzr/1.16-better_heads

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revno: 4389
revision-id: john at arbash-meinel.com-20090610185802-wsybzjfil447yhy2
parent: john at arbash-meinel.com-20090610164116-q2rbbja0szmexsry
committer: John Arbash Meinel <john at arbash-meinel.com>
branch nick: 1.16-better_heads
timestamp: Wed 2009-06-10 13:58:02 -0500
message:
  Change VF.annotate to use the new KnownGraph code.
  
  This shows a significant savings in the time for 'annotate NEWS', of about 5s/20s
  for knit formats, and 45s => 20s for GC formats.
  
  
  Also, factor the code into a helper, so that we can prepare for writing
  a pyrex version.
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