Faster compilation speed

[Robert Dewar]

> Frankly, nobody who wants to improve GCCs runtime performance can
> reasonably complain about this "dicipline" in the same breath :-)
> Others can feel free to disagree.


Of course the issue is what happens if there is a lapse in discipline. If it
is only a matter of efficiency, that's one thing, if it becomes a focus of bugs
then that's another. For me reliability of the code generator is far far more
important than speed.