The Spectre/Meltdown Performance Impact On Linux 4.20, Decimating Benchmarks With New STIBP Overhead
The Stress-NG micro kernel benchmarks also showed the performance hits of mitigation.
With the Optcarrot Ruby benchmark it was another case of the Xeon performance going from front to last and in fact lost more than half its speed.
The Blender performance only trended lower by several seconds with the kernel upgrade.