http://www.dsogaming.com/news/amd-aims-to-give-opengl-a-big-boost-api-wont-be-the-bottleneck/
Well, you gotta love AMD and its engineers. Mantle looks – in paper – amazing, however that’s not the only thing the red team is currently working on. According to Graham Sellers, OpenGL guy at AMD, the red team will be supporting this open API with some high performance extensions that will offer almost similar performance to AMD’s upcoming API, Mantle.
As Sellers claimed, AMD aims to expose all of the hardware of their GPUs with these upcoming high performance extensions of OpenGL, and gamers will be able to get close to theoretical peak and performance. Not only that, but Sellers claimed that games using the modern versions of OpenGL won’t be bottlenecked by the API anymore, meaning that gamers will hit HW limits first.