Jean Chalard 3b1b72ac4d More optimizations
We don't merge tails anyway, and we can't do it any more
because that would break the bigram lookup algorithm.
The speedup is about 20%, and possibly double this if
there are no bigrams.

Bug: 6394357

Change-Id: I9eec11dda9000451706d280f120404a2acbea304
2012-05-14 12:41:18 +09:00
..
2012-05-11 15:49:04 -07:00