@Phaedrus This is serious! Intel admits that the mitigation microcode will affect performance. Also, not all CPUs are patched yet and the vulnerability was known since 2018.

I include a couple of links for future readers.
Affected Intel CPUs: https://software.intel.com/security-software-guidance/insights/processors-affected-special-register-buffer-data-sampling
Paper from the University of Amsterdam: https://download.vusec.net/papers/crosstalk_sp21.pdf