Re[2]: [Haskell-cafe] speed: ghc vs gcc

20 Feb 2009

      Hello Dan,

Friday, February 20, 2009, 5:39:25 PM, you wrote:
...
Not that I'd be sad if GHC could reduce that whole constant at compile time,
but GCC isn't doing 1 billion adds in 6 (or even 60) milliseconds.
yes, that's what was done actually:

  22 0020 8D44D01C              leal    28(%eax,%edx,8), %eax
  23 0024 83C208                addl    $8, %edx

so, i rechecked with multiplies:

mult.hs      12.667
mult-fast.hs  2.512
mult.cpp      0.938

and xors:

mult.hs      12.605
mult-fast.hs  1.856
xor.cpp       0.339

-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin@gmail.com

Re[2]: [Haskell-cafe] speed: ghc vs gcc

Bulat Ziganshin