Ubuntu 16.04 vs. 18.04 Performance On Six Systems
On many of the systems, the Botan crypto program was running much faster on Ubuntu 18.04.
The x264 performance wound up being faster for the AMD EPYC/Ryzen boxes while on the Intel hardware was the same speed.
While in the AVX-heavy Himeno pressure solver test, the Intel CPUs saw a small but measurable performance improvement that didn't carry over to the AMD Zen-based systems.
The ebizzy test that tries to resemble server workload performance saw very significant performance improvements with the move to Ubuntu 18.04.