Benchmarking The Linux Mitigated Performance For Retbleed: It's Painful
The context switching times are even more painful now with Retbleed mitigations on top of the prior mitigations the past four years.
Needless to say, the researchers are accurate in their assessments of the significant performance costs with mitigating Retbleed.
The Intel systems were also impacted in the cryptsetup crypto performance with the Retbleed mitigations.