This article in PC World provides some interesting details:
https://www.pcworld.com/article/3245606/security/intel-x86-cpu-kernel-bug-faq-how-it-affects-pc-mac.html
It seems like the kernel developers are keeping the details under wraps until
they get the fix released; however, the article suggests that the issue will
probably affect all 64-bit Intel CPUs and older ones may be affected more
than newer ones (which may not be a good thing for fully free systems using
Core 2 Duos).
'The Core i7-8700K saw a massive performance decrease in FS-Mark 3.3 and
Compile Bench, a pair of synthetic I/O benchmarks.' --- yuck!
