Looking At The Linux Performance Two Years After Spectre / Meltdown Mitigations

A look at the code compilation impact on Ubuntu 20.04 LTS from these default mitigations while fortunately the latest-generation Xeon Platinum 8280 performance was unchanged.

Even Perl performance is affected by Spectre / Meltdown.

Various operations of the GNU C Library remain slower on pre-Cascadelake as a result of the mitigations.