I use arm servers in production and regularly benchmark them. On my application the M1 is 11x the speed of a rpi4 in single core performance. Ampere Altra run

I use arm servers in production and regularly benchmark them. On my application the M1 is 11x the speed of a rpi4 in single core performance. Ampere Altra running at 3ghz is a bit above 4x a rpi4. Single core. I'm moving to Ampere instances in the cloud.