> it takes only a few clock cycles for an Intel CPU to transfer data from its RAX register -> AVX vector registers, compute the solution, and transfer it back t

> it takes only a few clock cycles for an Intel CPU to transfer data from its RAX register -> AVX vector registers, compute the solution, and transfer it back to the "scalar world". unfortunately, it takes millions of cycles for the CPU to switch to the higher-power state necessary for AVX instructions, so your latency really isn't that much better. the radfft guy did a good writeup https://gist.github.com/rygorous/32bc3ea8301dba09358fd2c64e02d774 https://gist.github.com/rygorous/32bc3ea8301dba09358fd2c64e0...