Hi Jim,
Yes, I've looked very closely at what Rete II as implemented in OPSJ
and CLIPS-R2 can do - it's quite impressive. Rete II is, as PST will
point out repeatedly, a PROPRIETARY algorithm, so I don't think they
will share! Whatever it is, it's a clever trick, anyhow.
I think I know about half of it, and in fact, I've implemented that
half. The other half, I'm still thinking :)
I think James C. Owen wrote:
>
> Yes, it's me. And, yes, I quit posting this kind of thing on the Jess
> pages. :-)
>
> Please understand that I'm not running down Jess. I think Jess is, in a
> word, GREAT! However, if you haven't already done so (which you probably
> have) you might check out
>
> http://www.pst.com/benopsj.htm
>
> where Dr. Forgy has compared Compiled CLIPS 6.04 C++ running Rete versus
> Java OPSJ running Rete II. You might check with him and ask him what he
> did to get these results. Who know? Maybe he'll tell you. Maybe.
>
> Ernest Friedman-Hill wrote:
>
> > Jess can now run the University of Texas benchmarks (using a stock
> > Microsoft JVM) noticeably faster than CLIPS 6.04 (compiled with -O2) on
> > the same machine. The speedup scales nonlinearly with problem size, and
> > is most apparent for very large systems. For the "Manners" benchmark,
> > Jess now beats CLIPS by 25% at 64 persons, and by a factor of two at 80
> > persons. I'm using a new smart indexing system in the Rete memories to
> > get this speed.
>
> ttfn
>
> IHN
> Jim
>
> ---------------------------------
> James C. Owen
> Knowledge-Based Systems Corporation
> 4817 Buckskin Drive
> Fort Worth, Texas 76137
>
>
---------------------------------------------------------
Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
Org. 8920, MS 9214 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
Livermore, CA 94550
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