Re-Testing NVIDIA's Threaded OpenGL Optimizations For Linux Gaming
Unlike Portal, Team Fortress 2 saw a very small drop in performance when enabling NVIDIA's OpenGL threaded optimizations.
The Unigine Valley frame-rate was unchanged by the __GL_THREADED_OPTIMIZATIONS feature but the CPU usage went up from a 12% average to 22%.
Unvanquished saw no major change in performance.