Hi, When you insert an object, are all the properties checked one by one for pattern matching ? Or what is done ? I'm using Drools for a selection process and I have very bad performances because of it: 75 ms for the first insertion ... (an object with 20 properties), and totally 90 ms for 5 insertions of the same kind of objects. Compared with java code : 1ms ... But it's clear it is easier to write rules than java code. -- View this message in context: http://www.nabble.com/What-is-done-when-inserting-tp17670106p17670106.html Sent from the drools - user mailing list archive at Nabble.com.