I have do a jboss rules test, only one rule

rule "alarmdefine"

??no-loop true
??when
#conditions
alarm(reason:alarmreason, level:alarmlevel)
alarmdefine(alarmreason==reason, alarmlevel!=level)
??then
???#actions
???alarm.setCounter();?
end

eviroment: eclipse3.2M5, jdk1.4.2-03

when alarmdefine exist 50000 record, loop 1000 , result 20s
when alarmdefine exist 5000 recode, loop 1000, result 2s

I have do same test with JESS

(defrule alarm-cleared-all
(alarm (alarmreason ?a) (alarmlevel ?x) )
(alarmdef (alarmreason ?a) (alarmlevel ?y&:(<> ?y ?x)))
=>
(call alarm setCounter)
)

when alarmdefine exist 50000 record, loop 1000 , result only 0.2s

Why? what can I do?