[LAU] performance problems after kernel/microcode update ?

Hi, i recently updated my Arch linux system, to to the following version: Linux 4.18.6-arch1-1-ARCH #1 SMP PREEMPT Afterwards, i noticed that something has changed regarding the realtime permissions and that i had to install a new package called 'realtime-priviliges', which i never needed before, and subsequently add my main user to the 'realtime' group. In that wake, i updated the processor microcode, which i didn't use at all before (there always was some error message during bootup, but nothing else). After being able to start JACK in realtime again, i felt that there was a significant loss of performance. Things that didn't cause any dropouts before now start to crackle and gristle (as a sidenote, i mostly use SuperCollider to make sound). Also, and this puzzled me especially, there were dropouts, but no XRuns ... normally, when i push the system to the limits, i get XRuns, that'd be expected. But now, it's dropouts without, and they start way earlier. My machine has an Intel(R) Core(TM) i7-4600U CPU @ 2.10GHz Processor if that info is of user for anyone ... Anybody else noticed something like that recently ? Best, nik -- Niklas Reppel www.parkellipsen.de