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

Bulat Ziganshin bulat.ziganshin at gmail.com
Sat Feb 21 18:21:09 EST 2009

Hello Louis,

Saturday, February 21, 2009, 4:16:10 AM, you wrote:

> In the meantime, a brief summary:

a minor correction: the best gcc result shown in the thread was 50x
faster than Don's one, so you need to miltiple all ratios by a factor
of 50

> Straightforward and simple Haskell code, written by an individual
> aware of issues with tail recursion and stream fusion, is frequently
> within 3x the speed of GCC code when compiled with appropriate
> optimizations in GHC.

yes, within 150x margin

> When performance is an absolute necessity,
> Haskell code can sometimes be manually modified (e.g. with manual
> loop unrolls) to equal GCC in performance.

yes, to make it only 50x slower while being only 7 times larger (i
mean source lines)

> Can we move on?

yes, we can! :)

Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com

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