[rules-users] Performance of rules in Drools

Hello, I have a list of very similar rules executed in Drools and some performance problems appear ... I want some advices to choose between two "direction" in order to correct them ... First the context : I have to execute always the same check but with different level or "parameters". For example, - in the first demand (rule for our client) i have to count and retrieve the list all Article that have a family code equals to 'A', 'B' or 'C' and execute the then clause only if there is 3 elements in the filtered list. - in the second demand (rule for our client) i have to count and retrieve the list all Article that have a family code equals to 'B' or 'C' and execute the then clause only if there is 4 elements in the filtered list and so on ... The number of different group of parameter values and the values of theses parameters will change over time ... The question is : is it more efficient to implement a lot of different rules, each with their parameter in the code OR is it more efficient to implement only one rule with an additional object as a drools fact containing different parameter's values ? Thanks for your help Sébastien