Re: [rules-users] What's more efficient?
Most of the time, Join will be better, specially if it is an == join or
if you have many rules doing the same thing, because you get node sharing
between them.
If it is a one rule thing, or if the domain is large, but you need only
part of the information, you may be better loading the information into the
rule on-demand, using from.
[]s
Edson
2008/11/21 David Sinclair <dsinclair(a)chariotsolutions.com>
I have a question regarding the performance of pattern matching. Is
it more
performant to use join nodes, or to use a from?
For example. With joins I could write a rule like
rule "Foo Join"
when
Foo($bar : bar != null)
Bar(this == $bar)
then
...
end
rule "Foo From"
when
$foo :Foo()
Bar () from $foo.bar
then
...
end
thanks
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--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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