Discussion
What does it mean for a search algorithm to be optimally efficient?
Answer: A
Optimal efficiency is a statement about how few nodes an algorithm can get away with expanding given the information it has, and A star with a consistent heuristic has this property. It is quite distinct from optimality, which concerns the solution returned. Memory and wall clock speed are separate measures. Two properties both called optimal, meaning different things, is an unfortunate collision of vocabulary and one worth guarding against explicitly.
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