Looking At The Linux Performance Two Years After Spectre / Meltdown Mitigations
The MATLAB-inspired GNU Octave program is another one of the real-world affected workloads by Spectre and Meltdown on software-mitigated CPUs.
A look at the context switching time off Ubuntu 20.04 LTS and this assortment of Intel desktop CPUs.
A fresh look at the current Mozilla Firefox performance on Ubuntu 20.04 LTS shows the very real performance hits from the default mitigations. The Intel Core i9 10980XE did see some changes in performance but not as much as the older CPUs relying entirely on software mitigations.