Re: Performance problems

Edi Weitz <[email protected]> writes:

> I'm having severe performance problems using LISA.  I tried to create
> a very simple test case and it looks like this:
[...]
> which clearly demonstrate a hefty exponential growth.  This is with
[...]
> Is this expected behaviour or a bug?  Or am I doing something wrong?

Yes, I think this is expected behavior.  Your rules are too general
and end up trying all combinations of facts.  You should make them the
rules more specific.  The books mentioned in this blog entry:

  LISA and rule-based programming in Common Lisp
  file:///home/paolo/www/log-preview/050827.html

also provide good coverage of Rete performance, and how to write rules
to get the best performance.


Paolo
-- 
Lisp Propulsion Laboratory log - http://www.paoloamoroso.it/log


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