Sleep Timers usleep is the better ?

\ Advanced \ Sleep Timers Accuracy
have options

as host
usleep only
all timers

Both options are cpu timers (TSC) ?
What is the best option ? usleep ?

"All timers" create problems ?

What is the best option when the OS CPU host is being used at 100 % ?

Thanks for reply.

Usleep only is the default but I have seen some people get a performance increase by setting it to As Host, just try all 3 and see what works best for you

For an computer with minimum requirement being the games run in 100 % speed the "usleep only" can run better than "host" ?
That computer the cpu run between 75 to 100 %.