[Haskell-cafe] Re: Code and Perf. Data for Prime Finders (was: Genuine Eratosthenes sieve)

[Melissa O'Neill]

Neil Mitchell wrote:
>  -O3 is slower than -O2 and -O in ghc? If you want "fast code" then  
> specify -O2, not -O3.

Oops. That ought to have been -O2.

But from what I can tell, -O3 is harmless (at least in this case).   
Both invocations generate identical executables, at least for these  
examples on my machine.

     Melissa.