Re: [rules-users] Predicate expression effect on performance
In a sense, yes - but its the result of the comparison that is "cached"
really.
In the case you described, it is subrule generation. So either side of the
"or" is like a separate rule.
In version 3, the result of isSameAmount (ie if it was true or false) is
"cached".
Things will only be re-checked if the "Check" fact changes (and the engine
knows about the change).
Note that this checking happens as you are asserting objects, not when you
"fireAllRules" necessarily.
On 7/20/07, Yuri de Wit <ydewit(a)gmail.com> wrote:
What is the extent of the performance impact caused by using predicate
expressions?
Check( amount == $amount )
or
Check( $amt : amount -> (isSameAmount($amt, $amount) )
My understanding is that once asserted the amount property will be
"cached" in the shadow fact, is the result of isSameAmount(...) also
cached?
thanks,
-- yuri
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