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

Don Stewart dons at galois.com
Fri Feb 20 17:55:19 EST 2009

> Hello Achim,
> Saturday, February 21, 2009, 1:17:08 AM, you wrote:
> >> nothing new: what you are not interested in real compilers comparison,
> >> preferring to demonstrate artificial results
> >>
> > ...that we have a path to get better results than gcc -O3
> > -funroll-loops, and it's within reach... we even can get there now,
> > albeit not in the most hack-free way imaginable?
> well, can this be made for C++? yes. moreover, gcc does this trick
> *automatically*, while with ghc we need to write 50-line program using
> Template Haskell and then run it through gcc - and finally get exactly
> the same optimization we got automatic for C code
> so, again: this confirms that Don is always build artificial
> comparisons, optimizing Haskell code by hand and ignoring obvious ways
> to optimize Haskell code. unfortunately, this doesn't work in real
> live. and even worse - Don reports this as fair Haskell vs C++
> comparison

This is extremely depressing to read after the good results and lessons of this thread.

-- Don

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