[Haskell-cafe] Need help - my haskell code is over 50 times slower than equivalent perl implementation

[Tom Ellis]

On Tue, Jun 24, 2014 at 10:16:03PM +0530, C K Kashyap wrote:
> Does mapM work for you? Don't you run into too many files open error?

It works.  No error.  But is slower that your mapMI.  Undoubtedly there is a
method that is better than `unsafeInterleaveIO` and `mapMI` in terms of both
performance and conceptual coherence.