The Current RadeonSI Benefits Of Switching To Mesa 13.1-dev Git On Ubuntu 16.10
As some fun weekend benchmarks, there are OpenGL performance benchmarks of Ubuntu 16.10 out-of-the-box with Linux 4.8 and Mesa 12.0 then compared to Linux 4.8 with Mesa 13.1-dev Git (as of this week, using the Padoka PPA with LLVM 4.0 SVN) and then Linux 4.9 + the same updated user-space stack. All tests were done on the same Radeon R9 Fury box.
Beyond any performance changes, simply moving to Mesa 13.0 or 13.1-dev Git will get you the RADV Radeon Vulkan driver. If using Git in the past week or so, there is also the OpenGL 4.5 support exposed over OpenGL 4.3.
A number of Linux OpenGL games are noticeably faster with Mesa Git in place of Mesa 12.0.
But with running the development code, as you show know, there is always the risk of regressions.
See more benchmark results via this OpenBenchmarking.org result file. If you don't know how easy it is running with the Padoka PPA to upgrade your user-space open-source graphics components on Ubuntu 16.04 or 16.10, see the instructions from this earlier article.