It's difficult to suggest an optimized form for your rules 1-infinity, since we do not know what you want to achieve.<br><br>The crude duplication of rules where only the constant to be matched with Product.id varies can, most likely, be avoided.<br>
<br>-W<br><br><br><br><div class="gmail_quote">On Sun, Jul 19, 2009 at 3:15 PM, nesta <span dir="ltr"><<a href="mailto:nesta.fdb@163.com">nesta.fdb@163.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
Hi,<br>
<br>
I am a newbie in drools. There are a lot of simple rules in a scenario.<br>
For example<br>
rule 1<br>
when<br>
Product( id ==1, usage == 1)<br>
$decision : Decision()<br>
then<br>
$decision.setValue(1);<br>
end<br>
<br>
rule 2<br>
when Product( id ==2, usage == 1)<br>
$decision : Decision()<br>
rule 3<br>
when Product( id ==3, usage == 1)<br>
$decision : Decision()<br>
rule 4<br>
when Product( id ==4, usage == 1)<br>
$decision : Decision()<br>
rule 5<br>
when Product( id ==5, usage == 1)<br>
$decision : Decision()<br>
......<br>
<br>
I have a Product fact whose id = 5 and usage = 1, in my first thinking, only<br>
rule 5 is matched, there should be not much more different between 1 rule<br>
and a lot of rules in runtime.<br>
<br>
But the result shows that they are different. More rules will cost more<br>
time. If there are 1 thousand rules, some Node and Sink will execute 1<br>
thousand times.<br>
<br>
My question is how to optimize this scenario?<br>
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<br>
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