Program runs out of memory using GHC 7.6.3

[David Spies]

I tried all optimization levels of 7.6.3 and it runs out of memory
I tried all optimization levels of 7.8.3 and it doesn't

So it must be something the compiler does even without any optimization.

On Sat, Dec 13, 2014 at 3:05 AM, Mikolaj Konarski <mikolaj at well-typed.com>
wrote:
>
> tt may be that GHC 7.8 optimizes the program better.
> Compile with -O0 and see if it runs out of memory, too.
> If so, you can just optimize the program by hand.
> I'd suggest making a heap profilie with -O0 or in GHC 7.6
> and finding out where the memory goes.
>
> Of course, it's possible you've hit a compiler bug,
> but it makes sense not to start with that assumption.
>
> Have fun,
> Mikolaj
>
> On Sat, Dec 13, 2014 at 10:06 AM, David Spies <dnspies at gmail.com> wrote:
> > I have a program I submitted for a Kattis problem:
> > https://open.kattis.com/problems/digicomp2
> > But I got memory limit exceeded.  I downloaded the test data and ran the
> > program on my own computer without problems.  Eventually I found out that
> > when compiling with GHC 7.6.3 (the version Kattis uses) rather than
> 7.8.3,
> > this program runs out of memory.
> > Can someone explain why it only works on the later compiler?  Is there a
> > workaround so that I can submit to Kattis?
> >
> > Thanks,
> > David
> >
> >
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