Intel has patents in things like some of the newer vector instructions still - Apple AFAIK will not translate those, and will not report them as available. Mic

Intel has patents in things like some of the newer vector instructions still - Apple AFAIK will not translate those, and will not report them as available. Microsoft has a performance disadvantage in that the memory consistency model of ARM is much weaker than x86 sequential ordering or x86_64s total store ordering. Apple’s chips (at least back to the A12Z) support enabling TSO per thread on the performance cores, so the translated code does not need as much fencing.