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

Thomas Davie tom.davie at gmail.com
Fri Feb 20 17:19:47 EST 2009

On 20 Feb 2009, at 22:57, Bulat Ziganshin wrote:

> Hello Don,
> Saturday, February 21, 2009, 12:43:46 AM, you wrote:
>>    gcc -O3 -funroll-loops                      0.318
>>    ghc "-funroll-loops" -D64                   0.088
>> So what did we learn here?
> nothing new: what you are not interested in real compilers comparison,
> preferring to demonstrate artificial results

I'm not sure what you're getting at Bulat – it's been demonstrated  
that ghc is slower than gcc for most cases at the moment (many  
benchmarks will back this up), *however*, it's also easily verified  
that ghc has had significantly less effort directed at it than gcc and  
other imperative compilers, thus, there are many places it can improve  

In this case, you've pointed out a really great source of heavy  
optimisation.  Thanks a lot :)  Now perhaps it might be an idea to be  
constructive, rather than trying to stand like nelson going "HA HA" at  
the people with the inferior compiler.



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