C compile time

[Robert Dewar]

> But for the vast majority of working programmers, I
> simply don't see why 
> optimized compile times are such an issue.

In our world, we have many customers building very large systems that require
optimization to be turned on once they get past the initial integration
stage, so the great majority of development work is done in optimized mode.
The model where you do everything unoptimized and turn on optimization for
the final build and you are done is not reasonable for large critical systems
which must be extensively tested in essentially final form.

So for us, -O2 compilation time is indeed critical.