[Haskell-cafe] An interesting toy

[Stefan O'Rear]

On Sat, May 05, 2007 at 03:33:03PM -0500, Derek Elkins wrote:
> Try adding strictness annotations to all the components of all your data 
> structures (i.e. put a ! before the type).  Not all of the need it, but I 
> doubt any need to be lazy either.  Probably the reason quant8 seems to be 
> taking so much time is that it is where a lot of stuff finally gets forced. 
> Certainly, for things that are "primitive" like Colour and Vector you want 
> the components to be strict, in general.

(In theory at least) That would not be an issue at all - the GHC
profiler uses lexical, *not dynamic*, call stacks.

> I did this for the program and ran System1 100 and it took maybe a couple 
> of minutes, it seemed to be going at a decent clip.  200x200 should take 4 
> times longer, I assume, and I still don't see that taking 15 minutes. This 
> is on a laptop running on a Mobile AMD Sempron 3500+.  Also, you have many 
> many superfluous parentheses and use a different naming convention from 
> representative Haskell code (namely camelCase).

Stefan