Interesting. and kinda sad. and based on the comments an ongoing problem.
One hopes that ARM's ascendance would make "team x86-64" work in cooperative competition for better performance through compilers (it they can't through silicon).
One hopes that ARM's ascendance would make "team x86-64" work in cooperative competition for better performance through compilers (it they can't through silicon).
(IIRC Intel has tuned down the Cripple AMD thing in MKL around late 2020 by providing a specialized Zen code path. It was slower than what you get with the detection backdoor, but only slightly.)