During a few experiments I did with MVEL, I have found that 2.x actually performs slower than 1.x in our case. Maybe that is a starting point.

Scott, do you have the possibility to profile your application using 4.x and using 5.x? That should reveal the bottlenecks and I am sure that the dev crowd would be glad receiving that input.

 -- Ingomar


Am 28.05.2009 um 17:18 schrieb Scott Reed:

I just upgraded our app from Drools 4 to 5 libraries. We just use the rules engine with DRL. The performance of the engine on our rulebase is unacceptably slow. I assume there is something we need to do to our rules or the way we are configuring the engine to fix this. I don't see anything in the release notes about backwards compatibility issues. I would very much appreciate it if someone would direct me to any documentation that explains what needs to be done so our 4.0 rules perform at least as well as they did before the upgrade?
Thanks,
Scott
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