Stefan Dösinger of CodeWeavers has been working on some Direct3D performance improvements for Wine by creating a separate command stream / worker thread for WineD3D. This work moves OpenGL calls into a seperate thread in order to improve performance while also fixing some outstanding bugs. This work can yield 50~100% performance improvements and in some cases making the games under Wine faster than on Windows...
September 4, 2013
Direct3D Performance Improvements Coming To Wine
Read more at Phoronix