[Haskell-cafe] Can Haskell outperform C++?

Yves Parès yves.pares at gmail.com
Sun May 6 10:58:45 CEST 2012

I do not agree: the fib function is tail-recursive, any good C compiler is
able to optimize away the calls and reduce it to a mere loop.
At least that's what I learnt about tail recursion in C with GCC.

2012/5/6 Artur <apeka1990 at gmail.com>

> On 06.05.2012 10:44, Ivan Lazar Miljenovic wrote:
>> On 6 May 2012 16:40, Janek S.<fremenzone at poczta.onet.pl>  wrote:
>>> Hi,
>>> a couple of times I've encountered a statement that Haskell programs can
>>> have performance
>>> comparable to programs in C/C++. I've even read that thanks to
>>> functional nature of Haskell,
>>> compiler can reason and make guarantess about the code and use that
>>> knowledge to automatically
>>> parallelize the program without any explicit parallelizing commands in
>>> the code. I haven't seen
>>> any sort of evidence that would support such claims. Can anyone provide
>>> a code in Haskell that
>>> performs better in terms of execution speed than a well-written C/C++
>>> program? Both Haskell and C
>>> programs should implement the same algorithm (merge sort in Haskell
>>> outperforming bubble sort in
>>> C doesn't count), though I guess that using Haskell-specific idioms and
>>> optimizations is of
>>> course allowed.
>> How about http://donsbot.wordpress.com/**2007/11/29/use-those-extra-**
>> cores-and-beat-c-today-**parallel-haskell-redux/<http://donsbot.wordpress.com/2007/11/29/use-those-extra-cores-and-beat-c-today-parallel-haskell-redux/>
>> ?
>>  Hi,
>  isn't it that particular Haskell code is outperforming C (22 seconds vs.
> 33), just because the author uses recursion in C? I surely love Haskell,
> and the way it's code is easy parallelized, but that example seams not fair.
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