[merge] Faster 'bzr check' by doing parallel extraction

[Robert Collins]

On Mon, 2005-12-19 at 14:55 -0600, John A Meinel wrote:
> It took me a while to figure out what the proper set functions were (and
> a while realizing IntSet really is slower), but I updated Weave.check()
> so that it checks all of the revisions in parallel. This is part of my
> wanting to change "bzr check" into checking each weave independently,
> rather than having it extract each text one at a time.
> 
> Anyway, with the current code, it sets up an array of sha sums, and an
> array of inclusions. It then runs through the entire weave, and updates
> whatever revisions are active for each line.

Sweet.

Rob

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