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
1 file changed
tree: 397556263d62d2b6104d54e77d8d9204f4f1a53d
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk