Ilias, I can’t tell anything about performance of AMD Ryzen.
What I can tell about AMD (because I use the FX 8350) is, that, especially on Windows, coders have to know about the drawbacks of the 4-way L1-Cache (compared to the 8-way L1-Cache of Intel CPUs) and how to work around them to get max speed from the AMD CPU’s. As I use an AMD for RT and wanted to get max speed also with my AMD CPU for RT you can be quite sure that I did my best to write code which runs fast also on AMD CPUs.
As a note: not taking care of that can lead to 2x-4x increased processing times using AMD CPUs on Windows under special constellations.