Zstandard performance using the default packaged Zstd implementation on each OS has improved nicely with CentOS Stream 9.
LuxCoreRender was seeing some performance improvements out of CentOS Stream 9 when running on the AMD EPYC server.
The MT-DGEMM benchmark improved very nicely with CentOS Stream 9 and put the performance close to that of Intel's Clear Linux.
In other common workloads, the performance benefit of CentOS Stream 9 tended to be more modest.