[Haskell-cafe] speed: ghc vs gcc

[Peter Verswyvelen]

On Sat, Feb 21, 2009 at 12:22 AM, Bulat Ziganshin <bulat.ziganshin at gmail.com
> wrote:

> Hello Khudyakov,
>
> Saturday, February 21, 2009, 2:07:39 AM, you wrote:
>
> > I have another question. Why shouldn't compiler realize that `sum
> [1..10^9]'
> > is constant and thus evaluate it at compile time?
>
> since we expect that compilation will be done in reasonable amount of
> time. you cannot guarantee this for list-involving computation


it would be nice to have a compiler that can run forever, incrementally
generating faster and faster versions of the same program, until you press a
key or a timeout is reached.

then you just let it run before you get to bed ;-)

you could even pass it in a test data set to which it must be optimized;
after the program is compiled, the compiler runs and profiles it, measures
the results, and does another pass to make it faster.

some C++ compilers can already do this (profile based optimization).






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