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 <[email protected]> To: [email protected] 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 [email protected]' in the BODY of a message to [email protected], NOT to the list (use your own address!) List problems? Notify [email protected]. --------------------------------------------------------------------
