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

Ross Mellgren rmm-haskell at z.odi.ac
Fri Feb 20 19:05:51 EST 2009

Now perhaps I'll be stepping into some lines of fire as it seems like  
this thread is full of them. If I get in anyone's way please kindly  
hold your shot ;-)

That said, video codecs are the kinds of things that usually benefit  
greatly from vectorization and parallelization right? These are two  
areas that have been getting concentration recently.

I'm not really familiar with all the codecs involved, but it would  
probably be a great test case if someone could write a video codec  
(perhaps not H.264 since I recall someone saying it was ridiculously  
complicated) in C/C++ and in Haskell using all the DPH/parallelization  
tricks, as a comparison benchmark to improve the performance of the  
compiled code coming out of GHC.

Having two pieces of code that are decently optimized and should do  
the same thing seems like it would make finding snags in the GHC  
performance and fixing them that much easier.

Also, hunting with your bare hands rather than with a gun is provably  
more bad-ass ;-)


On Feb 20, 2009, at 6:52 PM, Bulat Ziganshin wrote:

> Hello Peter,
> Saturday, February 21, 2009, 2:36:15 AM, you wrote:
>> nothing should stop you from writing video games in Haskell since
> video codec isn't video game :)))
>> but I've worked with people that wrote physics engines in C/C++,
>> and they also had to hand optimize specifically for a certain  
>> compiler to get things fast.
> that's important signal. if you need to hand-optimize your code even
> if you use icl to compile it, using haskell will be like hunting with
> a hand instead of gun
> -- 
> Best regards,
> Bulat                            mailto:Bulat.Ziganshin at gmail.com
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