profiling and optimization

[Lars Gullik Bjønnes]

As you can see from the latest commit, I gave in on the "move some
small methods inline" controversy.

One thing I'd like to point out though: When trying to optimize you
should _always_ compile with "high" optimization turned on (in gcc
-O2) _and_ make sure that you compile LyX with assertions turned off.
(--disable-assertions) (hmm I thought we had a --without-warnings
option as well?)

Without this the profiling will not tell the true story.


-- 
        Lgb