Looks to be a complicated issue, with very different performance profiles across different microarchitectures: https://software.intel.com/en-us/forums/intel-is

Looks to be a complicated issue, with very different performance profiles across different microarchitectures: https://software.intel.com/en-us/forums/intel-isa-extensions/topic/704023 https://software.intel.com/en-us/forums/intel-isa-extensions...