[MERGE] Optimize revno calculation, revision-info and cat-revision

[Andrew Bennetts]

Aaron Bentley wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi all,
> 
> This patch is a followon to my other patch for optimizing revision-id
> calculations, and optimizes revno calculations.

bb:tweak

I haven't looked at the branch this builds on, but this part looks good.

Just one comment:

[...]
> === modified file 'bzrlib/branch.py'
> --- bzrlib/branch.py	2008-03-30 17:28:19 +0000
> +++ bzrlib/branch.py	2008-03-31 03:45:32 +0000
> @@ -1871,8 +1871,8 @@
>          self._extend_partial_history()
>          return list(reversed(self._partial_revision_history_cache))
>  
> -    def _extend_partial_history(self, stop_index=None):
> -        """Extend the partial history
> +    def _extend_partial_history(self, stop_index=None, stop_revision=None):
> +        """Extend the partial history to include a given index
>  
>          If a stop_index is supplied, stop when that index has been reached.
>          Otherwise, stop when the beginning of history is reached.
> @@ -1892,6 +1892,8 @@

You ought to describe stop_revision in this docstring too.

-Andrew.