[Haskell-cafe] More on performance

[Henning Thielemann]

On Tue, 3 Jun 2008, Don Stewart wrote:

> I wrote up the second part of the tour of understanding low level
> performance in GHC here,
>
>     http://reddit.com/r/programming/info/6lx36/comments/
>
> Follows on from the discussion last week about various performance
> related things.

Now the difficult question: How to write the 'mean' function in terms of
'sum' and 'length' while getting the same performance?