[vlovich123]

It’s a delicate balance and really hard to benchmark. You can write a micro benchmark that keeps the lookup table in cache but what if your function isn’t the only thing being done in a loop? Then even if it’s in the hotpath, there’s insufficient cache to keep the table loaded the entire way through the loop and lookup is slower.

TLDR: it depends on the usage and we actually should have multiple functions that are specialized based on the properties of the caller’s needs where the caller can try a cache or compute approach.