The first step of getting decent latency out of modern computers is to build a pile of cash that's taller than you then set it on fire.

They are optimized for throughput, not latency. If you want to do things in microseconds instead of anything from milliseconds to seconds you look at all the lovely code everyone has written in the last 40 years then throw it on top of the burning pile of cash.

I work in an area where microseconds matter and have to write everything from scratch in kernel mode C because nothing else cuts it.