Radeon Software 18.40 vs. Mesa vs. AMDVLK Benchmarks With Radeon RX Vega
Starting off with BioShock Infinite, using the Radeon Software 18.40 release led to much slower performance. Using Mesa 18.2.3 also led to a performance regression compared to the stock Ubuntu 18.04 environment. Fortunately, with the latest Mesa 18.3-devel Git code is where the fastest performance was found for this game.
Civilization VI was a big performance drop with Radeon Software 18.40 while this was another game where the latest Linux 4.19 kernel and Mesa 18.3-devel build was delivering the fastest performance.
Using Dota 2 with Radeon Software 18.40 components led to a big performance drop while of the other open-source drivers there wasn't much change.
With the Dota 2 Vulkan renderer there wasn't any measurable change in performance.