Skylake CPUs up to 50% slower when executing the same code

[Federico Lucifredi]

Interesting analysis of the impact of the much larger latency of the "PAUSE" instruction in the Skylake architecture:

https://aloiskraus.wordpress.com/2018/06/16/why-skylakex-cpus-are-sometimes-50-slower-how-intel-has-broken-existing-code/

It even refers to Agner's instruction tables in the analysis ;-)

http://www.agner.org/optimize/instruction_tables.pdf

Best -Federico

_________________________________________
-- "'Problem' is a bleak word for challenge" - Richard Fish
(Federico L. Lucifredi)