[rules-users] optimization on a lot of simple rules

[Wolfgang Laun]

It's difficult to suggest an optimized form for your rules 1-infinity, since
we do not know what you want to achieve.

The crude duplication of rules where only the constant to be matched with
Product.id varies can, most likely, be avoided.

-W



On Sun, Jul 19, 2009 at 3:15 PM, nesta <nesta.fdb at 163.com> wrote:

>
> Hi,
>
> I am a newbie in drools. There are a lot of simple rules in a scenario.
> For example
> rule 1
>    when
>        Product( id ==1, usage == 1)
>        $decision : Decision()
>    then
>         $decision.setValue(1);
> end
>
> rule 2
> when Product( id ==2, usage == 1)
>  $decision : Decision()
> rule 3
> when Product( id ==3, usage == 1)
>  $decision : Decision()
> rule 4
> when Product( id ==4, usage == 1)
>  $decision : Decision()
> rule 5
> when Product( id ==5, usage == 1)
>  $decision : Decision()
> ......
>
> I have a Product fact whose id = 5 and usage = 1, in my first thinking,
> only
> rule 5 is matched, there should be not much more different between 1 rule
> and a lot of rules in runtime.
>
> But the result shows that they are different. More rules will cost more
> time. If there are 1 thousand rules, some Node and Sink will execute 1
> thousand times.
>
> My question is how to optimize this scenario?
> --
> View this message in context:
> http://www.nabble.com/optimization-on-a-lot-of-simple-rules-tp24556724p24556724.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20090719/538f83a8/attachment.html