[Haskell-cafe] speed: ghc vs gcc

[Khudyakov Alexey]

On Friday 20 February 2009 16:29:29 Bulat Ziganshin wrote:
> Hello haskell-cafe,
>
> since there are no objective tests comparing ghc to gcc, i made my own
> one. these are 3 programs, calculating sum in c++ and haskell:
>
> main = print $ sum[1..10^9::Int]
>
> ... skipped ...

The discussion is mostly about low level optimizations such as loop unrolling 
etc. 

I have another question. Why shouldn't compiler realize that `sum [1..10^9]' 
is constant and thus evaluate it at compile time? 

-- 
  Khudakov Alexey