[MERGE] Redo annotate more simply, using just the public interfaces for VersionedFiles.

[Robert Collins]

On Wed, 2008-07-02 at 00:14 -0400, Martin Pool wrote:
> Martin Pool has voted tweak.
> Status is now: Conditionally approved
> Comment:
> So this is certainly simpler, which was nice.
> 
>  From your previous conversation with John it was not clear to me whether
> this would be slower or not:
> 
> >> It will be slower primarily because we can't use the cached matching
> >> blocks. So we have to re-diff every file.
> >
> >There is self._extract_matching_blocks. Oh, the optimiser is missing
> >there on knits - I'll do a patch to reinstate that today. But bundle
> >generation uses that for make_mpdiffs and is still totally generic.
> 
> It looks like it might be.  Maybe we should measure this on a regular
> pack repository and if necessary special-case it for non-stacked
> repositories?
..

Sounds reasonable. John - do you have a bench for annotate?

> This smells like it should be a separate named method, maybe on the 
> knit?

Sure.

> Aside from that if you think the performance tradeoff is reasonable it's
> ok with me.

Well, working >> not working I guess :P. But yes, lets check its not a
total disaster before merging.

-Rob
-- 
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