[rules-users] Predicate expression effect on performance

[Yuri de Wit]

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