Re: [rules-users] 答复: MVEL performance penalty

Hi, Laun,**** ** ** I might be dull but what does this indicate? Drools did OPTIMIZE MVEL dialect? But call it twice means optimization?**** ** ** Best**** Abe**** ** ** *发件人:* rules-users-bounces(a)lists.jboss.org [mailto: rules-users-bounces(a)lists.jboss.org] *代表 *Wolfgang Laun *发送时间:* 2012年1月5日 16:53 *收件人:* Rules Users List *主题:* [rules-users] MVEL performance penalty**** ** ** Drools 5.3.0 FINAL. This experiment was inspired by code posted with the insinuation that MVEL would "optimize" condition evaluation. - Consider this rule: rule "Term - java" dialect "java" when $ea : EasyApp( Test.valueInList( $ea.getProductCode(), "CAR" )==true && age < 0 ) then end You'd expect that Test.valueInList() is called once per inserted EasyApp fact, and this can be verified easily. - Now the same rule, with MVEL's syntactic sugar: rule "Term - mvel" dialect "mvel" when $ea : EasyApp( Test.valueInList( productCode, "CAR" )==true && age < 0 ) then end *Now Test.valueInList() is called twice for each inserted fact.* Cheers Wolfgang **** _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users