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

[Denys Duchier]

Aaron Bentley <aaron.bentley at utoronto.ca> writes:

> Denys Duchier wrote:
>> I don't think that's meaningful.  You need a revision history to do a delta,
>> otherwise you can't know which is the "previous" revision (you can use left-most
>> parent, but that's arbitrary).
>
> It's not arbitrary.  It represents the changes that this revision made
> to the tree in which it was committed.

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).

--Denys