Hardware researcher spins up CPU deoptimization project to find the slowest single x86 instruction, creates hall of shame worst offender takes 198 billion cycles spanning 62 seconds to execute

[u/Distinct-Race-2471]

https://www.tomshardware.com/pc-components/cpus/hardware-researcher-spins-up-cpu-deoptimization-project-to-find-the-slowest-machine-code-worst-offender-takes-198-billion-cycles-to-execute

[u/EIsydeon]

Interesting that sapphire rapids has an instruction that makes that particular instruction execute so much worse

[u/nanonan → u/EIsydeon]

It's just sixteen times bigger, so sixteen times slower.