Radeon RX 580: AMDGPU-PRO vs. DRM-Next + Mesa 17.2-dev
While Deus Ex: Mankind Divided started out as unplayable with RadeonSI Gallium3D when it was released, thanks to continued optimization work by AMD and Valve developers, it's now in much better shape. In fact, with this bleeding-edge open-source driver stack, the RX 580 is faster with the open code than AMDGPU-PRO 17.10 -- and with correct rendering.
The Dota 2 OpenGL performance was similar between AMDGPU-PRO and the latest DRM-Next + Mesa 17.2-dev code.
The RX 580 Polaris card out-of-the-box on Ubuntu 16.04.2 LTS was much slower than AMDGPU-PRO, but once pulling in the newer AMDGPU DRM code and Mesa 17.2-dev, it's now faster than this hybrid proprietary driver.
Recent advancements in AMDGPU and RadeonSI also now allow the open-source code to outperform AMDGPU-PRO for the demanding Metro Last Light Redux game.