Donald Bruce Stewart wrote:
> Some things to remember using Doubles:
>
> * {-# OPTIONS -fexcess-precision #-}
> * -fvia-C
> * -fbang-patterns
> * -optc-O2 -optc-mfpmath=sse -optc-msse2
> * -optc-march=pentium4
>
1. What do all those things do?
2. Is the effect actually that large?