This is another one of those PLace-Oriented Programming (PLOP) problems. Rather than a fictional "now" read at a place, perceive a factual "then" which may be c

This is another one of those PLace-Oriented Programming (PLOP) problems. Rather than a fictional "now" read at a place, perceive a factual "then" which may be cached to your heart's content. Granted, if you aren't taking advantage of immutable data in the first place, it can hurt to get there.