I really don't need the preaching. I wanted a straight answer.
Au contraire. You got a rather information-packed answer that is as
straight as possible, dosed up with a bit of good-natured joshing. You
now know:
Process-cycling Unix
Threads manipulation Windows
FP Arithmetic Depends on CPU, not OS
Graphics Display Depends on graphics card, not OS
And you know that to gauge other subsystems you will have to write code
and see.
Relax a little, would ya?! The fact that you get a cheeky answer doesn't
mean you're not welcome.