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.)

On Wed, Jul 3, 2013 at 3:14 PM, Emanuel Koczwara <poczta@emanuelkoczwara.pl> wrote:

Hi,

Where can I find some informations abut memory usage prediction? In C
(or C++) while I write code I can predict how much stack space will be
used, how much heap space will be used, I can count instructions. I want
to see all these things while I'm looking at my code. Is it possible in
Haskell?

Best regards,
Emanuel

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