[Haskell-cafe] Why is this code slow?

[Tom Ellis]

On Tue, Apr 29, 2014 at 09:15:18PM +0200, Jakub Arnold wrote:
> in my stumbling over Reddit I happened to find the following comment
> http://www.reddit.com/r/programming/comments/248abo/range_comprehensions_c/ch56g7b,
> where the poster shows a simple algorithm which is really slow when
> implemented in Haskell, compared to a C++ counterpart which does it the
> same way.

I have done my duty.