Hi Mark, I'm giving a presentation to my company tommorow on drools, and one question that will come up will be the performance of drools. I know that the performance is dependent on the type of rules, but I would like to know the following :
1. How many rules does the manners64 execute ? 2. How big was the fact base ? 3. What kind of rules allows drools to scale linearly between time and the number of rules ? I'm sorry that this is of such short notice. Here is some stuff that I saw : http://weblogs.java.net/blog/schaefa/archive/2005/10/drools_performa.html http://geekswithblogs.net/cyoung/articles/54022.aspx Regards, Alan Ho -----Original Message----- From: Mark Proctor [mailto:[EMAIL PROTECTED] Sent: Thursday, March 09, 2006 7:06 AM To: [email protected]; Drools User List Subject: [drools-user] JESS6 vs Drools3 vs CLIPS 6.23 http://woolfel.blogspot.com/2006/03/jess6-vs-drools3-vs-clips-623.html Since last Spring, Drools has been making steady progress on improving the core RETE implementation. Tonight I ran manners64 in both Jess6 and Drools3. Jess 6 - 2208 ms Drools 3 - 9781 ms CLIPS 6.23 - 67.219 seconds To put things in perspective, JESS is one of the fastest RETE engines and many commercial engines can't beat it. Take for example Blaze Advisor, which has been around for over a decade. The old blaze engine was slow. It's well known within the rule industry. Last year FairIssacs bought RulesPower, to get a faster engine. In the last 8 months, Mark has rewritten Drools core and managed to make significant performance and scalability improvements. Using the old Drools2 core, 16 guests took several minute. Now 64 guests finishes within 10 seconds. A modest guess is that drools3 is atleast 10-20x faster than drools2. Hopefully the users will appreciate all the hard work the drools team put into drools3. It's nice to know the code I contributed last year has helped Drools 3 match CLIPS 6.23 performance.
