A week ago, news about AMD's Inception vulnerability broke, and the first deep dive into the performance impact of mitigations has been published. Linux-centric Phoronix has just uploaded eight pages of test results. Using an AMD Epyc 7763 (Zen 3) based system, running Linux (of course), the site tested a plethora of apps and tabulated before and after-patching results. Depending on workload, you might not see much difference — however, some tasks were up to 54% slower on a patched system.
Data from Phoronix benchmarking
