[rfc] [patch] speeding up bzr log with a tree delta iterator

[Aaron Bentley]

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Denys Duchier wrote:
> it's also arbitrary that if the revision is not in your history you can get a
> delta with the left parent, but if it is in your history, you can't (e.g. if you
> pulled it).

I think it's a pretty easy distinction to grasp, though.  Anyhow, my
point was only that it's not arbitrary-- the left-parent ancestry has a
very specific meaning.

Anyhow, I think this is way offtopic, because all John wants is the
ability to show a single, arbitrary log using the log command.  Verbose
was not mentioned, but it could *always* be the lefthand parent, for all
I care.  (i.e. I never use verbose.)

Aaron
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