[janwas]

:) For anyone interested, here's a brief discussion of tail handling: https://github.com/google/highway#strip-mining-loops

(Overlapping is indeed cool where it works - idempotent operations.)

[moonchild]

> idempotent

Roughly speaking, while you do need idempotence for reductions, you do not need it for maps. (Of course, plenty of things don't look quite like reductions or maps--or they look like both at once--and each is unique.)