@Phantasm I am not talking about this FEP in particular, but about the general principle. Resolving an object may be a SELECT query, while the side effect may be an INSERT query. The details don't matter, it's always two different operations because you don't know what side effect will be needed.
In some cases, the first operation can be avoided by giving activities better names (or by using one of the hacks I mentioned in another post).
There is no associated cost. You get a better protocol and more efficient implementations for free.
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