Hi Tim,

Yes. Clara does Rete-style structural sharing of equivalent rule constraints, 
and then compiles those constraints into Clojure expressions. This actually 
happens when a rule session is created for a set of rules, but this is memoized 
by default so you only pay that cost the first time.

There are some opportunities to do more fine-grained sharing of parts of rule 
constraints, but that's an optimization we haven't gotten to yet. :)

-Ryan

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