[MERGE] Make bzr log FILE faster by looking up text_keys one at a time.

[Ian Clatworthy]

Ian Clatworthy has voted comment.
Status is now: Waiting
Comment:
Fixing log performance properly will undoubtedly take some work on the 
internals and that will take time and probably a new format with better 
indices. I'm in favour of including a short term fix like this in 1.6 if 
you can provide some additional test results showing it's a win over a 
network and not just locally.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3Cc28763af0807091602k25a4b3b9t37de9d4d0f2c0a26%40mail.gmail.com%3E