When looking at the performance of Zink’s OpenGL over Vulkan implementation just about one year ago the performance had a lot to be desired. But since then they have patches bringing it all the way to OpenGL 4.6 compared to the OpenGL 2.1 days and there has also been a lot of work on the performance. The performance at least for select operations is now turning out better than even the developers were expecting…

Source: Phoronix – Zink OpenGL-Over-Vulkan Driver – Performance Is Turning Out Better Than Expected