Line trace work with Async?

Hi, first of all, thx for reading this.

I have a loop and in this loop, im doing BoxTraceSingle() and LineTraceSingleByChannel(), I want to know these two traces are working with Async ?

my imagine was if I Async for big loop it helps to prevent to bottleneck CPU but when I check CPU it seems its doesn’t use other treads! ( i test it with getting primes numbers and its work I saw other threads go to 100 % usage ) and for tracing when doing it normally without async give me better performance.