[plt-scheme] Ants from ICFP

From: Arjun Guha (guhaarju at grinnell.edu)
Date: Thu Jun 10 16:53:55 EDT 2004

By the way:

(load "test.ss")

You should be able to tweak parameters in test.ss to choose different 
ants and world.

(score-world) returns (red-score . black-score).


On Jun 10, 2004, at 15:46, Felix Klock's plt proxy wrote:

> On Jun 10, 2004, at 3:20 PM, Arjun Guha wrote:
>> I'll post the rest over the weekend.  The most important optimization 
>> is that I preprocess instructions running the simulation (i.e. I 
>> create 10,000 * 2 procedures) so that I don't have to  lookup states.
> I actually tried this technique (I was quite pleased at how I was able 
> to use "You Want It When" style macros to accomplish it too!)
> BUT it failed miserably (in that I got slower runtimes doing this than 
> just using the state lookup directly, or at least they weren't 
> significantly faster when run under the interpreter, and under after 
> applying mzc to the scheme source, it was definitely slower.
> I suspected that creating 10,000 (* 2 ?) procedures was a bad thing to 
> do to your instruction cache when each procedure is being mapped to a 
> separate bit of C code.  But it could be that I was employing a 
> particularly naive code generation strategy.  You can get an idea of 
> the technique I used by looking at ant-compilation.scm and 
> ant-compilation-helper.scm on the code post link I posted to the list 
> earlier.
> In any case, I will *definitely* be looking at your code, after 
> hearing this tidbit.
> -Felix
> "(Dijkstra, as I'm sure you know, was the
> author of 'Gotos Considered Harmful' - a landmark
> work in programming methodology, applauded by Pascal
> programmers and quiche eaters alike)"  -Real Programmers don't use 
> Pascal

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