[Haskell-beginners] Memory usage prediction

[Patrick Mylund Nielsen]

I would say "yes". I haven't had any big problems with space leaks that I
couldn't identify via the profiler, then fix.

I certainly wouldn't look at another language instead of Haskell for this
one reason, unless you really need a specific arena size, and you know
exactly what you want where, in which case you're probably writing an
application that's better suited by a language without a garbage collector,
anyway.


On Wed, Jul 3, 2013 at 3:31 PM, Emanuel Koczwara
<poczta at emanuelkoczwara.pl>wrote:

> Hi Patrick,
>
> Dnia 2013-07-03, śro o godzinie 15:20 -0400, Patrick Mylund Nielsen
> pisze:
> > The short answer is no. This is Haskell's biggest weakness: it's
> > difficult to predict space usage.
> >
> >
> > The longer answer is "kind of" -- you can't exactly intuit it, but the
> > profiler is easy to use:
> >
> >
> > http://book.realworldhaskell.org/read/profiling-and-optimization.html
> >
> > http://www.haskell.org/ghc/docs/7.6.2/html/users_guide/prof-heap.html
> >
> >
> >
> > The only caveat is you have to reinstall your libraries with profiling
> > enabled:
> http://stackoverflow.com/questions/1704421/cabal-not-installing-dependencies-when-needing-profiling-libraries
> >
> >
> > (If I've already installed some packages, usually I take the quick and
> > dirty route and just set library-profiling to True, delete ~/.ghc to
> > clear the package list, then install my package.)
> >
>
>   Thank you for such a quick response. I know all that profiling
> 'stuff'. So, I will put it this way: is there a chance, that I will be
> able to predict performance after some time of profiling my code?
>
> Best regards,
> Emanuel
>
>
>
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