Phoronix published Radeon RX 5700 / RX 5700 XT Linux Gaming Performance With AMDGPU 5.3 + Mesa 19.2-devel
A quote from the article:
Now that the flow of initial Navi fixes and optimizations has settled down for both the AMDGPU DRM kernel driver and the Mesa RADV/RadeonSI user-space driver components, here is a look at AMD Radeon RX 5700 and RX 5700 XT graphics card performance on Ubuntu Linux at the end of July, now three weeks after these 7nm graphics cards first shipped.Radeon RX 5700 / RX 5700 XT Linux Gaming Performance With AMDGPU 5.3 + Mesa 19.2-devel