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

[Robert Collins]

Robert Collins has voted comment.
Status is now: Waiting
Comment:
This is counter-intuitive - generally GraphIndex performs better if 1 
query for N keys is made rather than N queries for each of those 1 keys. 
What data set are you working with?

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