Can "bzr annotate" be sped up?

[Stephen J. Turnbull]

John Arbash Meinel writes:

 > Basically we extract every revision of the text over its history, and
 > then do a comparison over time.

Two questions, not answered in the thread to date AFAICS:

1) You mean the history *of the file* (ie, revisions that touch it),
   right?
2) I thought bzr packs use delta compression, don't the deltas provide
   sufficient information?

I agree with Stefan, by the way: in my personal use, the only time I
ever want a full-file annotation is when I'm determining ownership,
and need to know all authors of the current file, and where.  In those
cases, any excuse to postpone the work is a godd excuse. :-/  The rest
of the time I want to know who touched one or more ranges of lines and
when, and I want that ten minutes ago.

YMMV, of course.