Meltdown's Linux patches alone add big load to CPUs, and that's just one of four fixes

Netflix chap and predicts streamer will cop slowdown between 0.1% and 6%

Netflix engineer, dTrace Daddy and famed shouter at hard disk drives Brendan Gregg has cooked up a "microbenchmark" to assess the Linux kernel page table isolation (KPTI) patch for the Meltdown CPU design flaw and come up with predictions of significant-but-manageable performance degradation."