As we have been expecting, as of a few minutes ago in Mesa 20.2-devel Git, the Radeon Vulkan “RADV” driver has enabled the Valve-backed ACO shader compiler by default rather than AMD’s official AMDGPU LLVM shader compiler back-end…

Source: Phoronix – Mesa 20.2 RADV Driver Flips On ACO By Default For Quicker Game Load Times, Better Performance