Greg, Can you check 5.1.1 instead? There was a problem in 5.1.0 that caused indexes to be disabled in certain situations and also a bug on "exists". In general, we had the opposite feedback: reduction of memory usage and performance increase due to reduced GC overhead.
Edson 2010/9/2 Greg Barton <[email protected]> > I've observed a sizable (25%) performance degradation between the 5.0.1 and > 5.1.0 releases. I've attached a sample project that tests the performance > of matching nested objects. (ANd compares direct reference matching and the > performance pitfalls of "from," but that's beside the current point.) > > If you switch the pom.xml from using 5.0.1 to 5.1.0 for the drools > dependencies you'll see 25% longer execution times on the tests. (mvn test) > > > Here's the test output: > > 5.0.1 > > reference.drl Count: 2000 > reference.drl Time: 267ms > reference.drl Time per element: 0.1335ms > BAR Duplicates: 780 > FOO Duplicates: 880 > > reference.drl Count: 20000 > reference.drl Time: 1249ms > reference.drl Time per element: 0.06245ms > BAR Duplicates: 7702 > FOO Duplicates: 8040 > > from.drl Count: 200 > from.drl Time: 1139ms > from.drl Time per element: 5.695ms > BAR Duplicates: 112 > FOO Duplicates: 102 > > reference.drl Count: 200 > reference.drl Time: 5ms > reference.drl Time per element: 0.025ms > BAR Duplicates: 86 > FOO Duplicates: 60 > > > 5.1.0 > > reference.drl Count: 2000 > reference.drl Time: 300ms > reference.drl Time per element: 0.15ms > BAR Duplicates: 788 > FOO Duplicates: 820 > > reference.drl Count: 20000 > reference.drl Time: 1564ms > reference.drl Time per element: 0.0782ms > BAR Duplicates: 8142 > FOO Duplicates: 7960 > > from.drl Count: 200 > from.drl Time: 3543ms > from.drl Time per element: 17.715ms > BAR Duplicates: 68 > FOO Duplicates: 90 > > reference.drl Count: 200 > reference.drl Time: 13ms > reference.drl Time per element: 0.065ms > BAR Duplicates: 84 > FOO Duplicates: 74 > > > On the most taxing test (20k objects) 5.0.1 took 1249ms while 5.1.0 > took 1564ms, and for larger tests the effect is more pronounced. This is > primarily a test of == on object references. > > GreG > > > _______________________________________________ > rules-dev mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-dev > > -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com
_______________________________________________ rules-dev mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-dev
