Re: [Haskell-cafe] Haskell version of ray tracer code is much slower than the original ML

Philip Armstrong writes: (snip)

Why on earth would you use -fexcess-precision if you're using Floats? The excess precision only apples to Doubles held in registers on x86 IIRC. (If you spill a Double from a register to memory, then you lose the extra precision bits in the process).

Some googling suggests that point 2 on http://www.haskell.org/hawiki/FasterFloatingPointWithGhc might have been what I was thinking of. -- Mark