On modern CPUs such tricks are irrelevant. They are able to process multiple instructions in the same time, so that the main bottleneck is no longer executing instructions, but accessing memory.
Kind of, but not really? At its core this article is basically a hack to do a bit of SIMD on an instruction set that doesn't have SIMD. Obviously SIMD is still highly beneficial on modern CPUs otherwise compilers would stop emitting it.
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