An Early Run With Ubuntu 26.04 On AMD EPYC Turin - The Current Performance Gains Over Ubuntu 24.04 LTS
With the same GCC 15 compiler as Ubuntu 25.10, for workloads not too interactive with the kernel and other components the performance on Ubuntu 26.04 is coming in similar to Ubuntu 25.10, as expected. In many cases though this is already a nice improvement over Ubuntu 24.04 LTS that debuted nearly two years ago. With Ubuntu LTS HWE stacks not bringing down new major compiler versions, especially for those on newer CPUs there can be meaningful gains to tap with the new Ubuntu versions compared to a two year old LTS release.
While faster than Ubuntu 24.04 LTS, in some of these benchmarks there still is the performance advantage of CachyOS thanks to its more aggressive defaults and pulling in some of the changes like those previously carried by Intel's now defunct Clear Linux platform.
The 5th Gen AMD EPYC server was performing consistently better at least on Ubuntu 25.10 and 26.04 over 24.04 LTS.
While we've benchmarked CachyOS many times at Phoronix, its aggressive performance never gets old and makes running these sort of benchmarks exciting. Some of these advantages are also carried by upstream Arch Linux.