[Haskell-cafe] Re: mapM as a Space Leak

[Chung-chieh Shan]

Thomas Hartman <tphyahoo at gmail.com> wrote in article <910ddf450903261240p4e4fc8b3pa927fac1b80b2a22 at mail.gmail.com> in gmane.comp.lang.haskell.cafe:
> Well, that's reassuring.
> 
> The reason I asked is that the testp function didn't just show poor
> performance. The state monad implementation actually gave a different
> answer -- nonterminating, where the pattern matching solution
> terminated.

Indeed, DIFFERENT Haskell programs can give different answers, even on
the SAME Haskell implementation.  That should not be surprising at all.

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