KingLucius I have a decently capable i5 laptop (i5-8250U) and I am experiencing the same problems. In the reddit thread I linked above, some users have suggested “using mitigations=off as a kernel boot parameter,” although it doesn’t seem to do much for me (though I am not sure I did it right). I think being exposed to the vulnerability actually is preferable over the performance hit, as the computer spikes so often that it is near unusable for many trivial tasks and entirely unusable for heavier stuff.
There will probably be some optimizations in the future, but for the time being a temporary solution (other than staying on an old kernel) would be nice.