I got this one, Ernest :-) Try
import jess.*; On Wed, Jun 8, 2011 at 4:22 AM, Nessrine Nassou < kachroudi.nessr...@yahoo.com> wrote: > Hi to all, i need help please. How can i import the jess class "Rete" in > java application? > > > thanks for help > > ------------------------------ > *From:* Ernest Friedman-Hill <ejfr...@sandia.gov> > *To:* jess-users@sandia.gov > *Sent:* Mon, June 6, 2011 1:37:16 PM > *Subject:* Re: JESS: On the Performance of Logical Retractions > > I don't think there's a particular reason in general. Retracting a fact > takes only a little longer than asserting one, on average. But if we assume > liberal use of "logical", retracting a single fact could result in a sort of > "cascade effect" whereby retracting a single fact would result in many other > facts, and many activations, being removed also due to dependencies. All of > that would take time. Still, your case seems extreme. Maybe there's > something pathological about this particular case. > > > On Jun 5, 2011, at 3:18 PM, Md Oliya wrote: > > > Hi, > > > > I am doing some experiments with a set of rules which contain the > "logical" CE. > > I intend to see the performance of Jess on a set of assertions as well as > retractions. > > > > After some experiments, I found that the runtime for assertions is much > less than that of retractions. > > In fact, the performance on retractions is so bad that I would rather re > (run) jess on a retracted kb. > > > > > > A sample test case: > > The KB size, number of assertions, number of retractions, and number of > rules are 100K, 50K, 1k, and 100, respectively. > > runtimes are >> initial run: 860ms, assertions:320ms -- retractions: > 4s. > > > > > > Would you please give some hints on the reason? > > > > > > Thanks in advance. > > --Oli. > > --------------------------------------------------------- > Ernest Friedman-Hill > Informatics & Decision Sciences, Sandia National Laboratories > PO Box 969, MS 9012, Livermore, CA 94550 > http://www.jessrules.com > > > > > > > > -------------------------------------------------------------------- > To unsubscribe, send the words 'unsubscribe jess-users y...@address.com' > in the BODY of a message to majord...@sandia.gov, NOT to the list > (use your own address!) List problems? Notify owner-jess-us...@sandia.gov. > -------------------------------------------------------------------- > > -- Cheers, Jason ------------------------------------------------------ Morris Technical Solutions LLC consult...@morris-technical-solutions.com (517) 304-5883
