Intel's open-source "ANV" Vulkan driver for Linux systems recently enabled a new feature called BTP+BTI RCC Keying. This change, which landed today, helps improve the performance of Direct3D 12 (DX12) games when run on Linux. This performance enhancement is specifically for games leveraging Valve's Steam Play with Proton and VKD3D-Proton. While the specifics of BTP+BTI RCC Keying are complex, its practical impact is beneficial for gamers using Intel GPUs on Linux. According to Phoronix, the feature "helps with the performance of Direct3D 12 (DX12) games running on Linux by way of Valve's Steam Play with Proton + VKD3D-Proton."