[Haskell-cafe] announce: Glome.hs raytracer

pepe mnislaih at gmail.com
Thu Mar 27 08:56:57 EDT 2008

On 27/03/2008, at 3:49, Ian Lynagh wrote:
> On Wed, Mar 26, 2008 at 02:33:20PM -0700, Jim Snow wrote:
>> -Memory consumption is atrocious: 146 megs to render a scene that's a
>> 33k ascii file.  Where does it all go?  A heap profile reports the  
>> max
>> heap size at a rather more reasonable 500k or so.  (My architecture  
>> is
>> 64 bit ubuntu on a dual-core amd.)
> I haven't looked properly yet, but it looks like something is leaking
> memory that shouldn't be. The attached Gloom.hs uses constant memory,
> but if you replace the "map" with the commented out "(parMap rnf)"  
> then
> the memory use seems to keep increasing, even once it has run display
> once and is running it a second or third time.

In my system the leak only appears with +RTS -N1 (which is the default).
If I use -N2 or higher, then your version runs in constant memory with  
(parmap rnf).


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