Receive flow steering

watch -n1 cat /proc/interrupts

Look for the line that says "Rescheduling interrupts". If your apps are loading up with some sort of io such as sssd block io or very fast network io, the scheduler tends to flip out. Thats causes your app to slow down due to being rescheduled. The solution is to setup the affinity of your block devices, network cards, or applications.

In short... depending on your hardware and applications, it can still very much be an issue.