[rfc] another idea for speeding the display of merged revisions in status

[Martin Pool]

Mark asked me: when you do the merge, you presumably work out which
revisions need to be merged.  Why not cache them into the working tree
then, and avoid recomputing it for status?

It was at least a good enough questions that I couldn't see off hand
why it wouldn't work.

Of course you will have to be careful with the cache if the basis or
pending merge list changes.

-- 
Martin <http://launchpad.net/~mbp/>