Seven Years Of Ubuntu Performance - Benchmarking Ubuntu 13.04 Through Ubuntu 20.04 Development Builds
Intel's Embree software running on the various Ubuntu releases only saw minor fluctuation with time.
The best VP9 encode performance was on Ubuntu 17.04 while the Ubuntu 19.10/20.04 results are comparable to that of Ubuntu 13.04.
The x264 results were basically the same due to most of the performance sensitive code paths being in hand-written Assembly.
The Stockfish chess performance has been sliding lower little by little.