performance on mantle, dx and ogl <p>So recently with all the commotion on the new API for 3d graphics which supposedly accelerate graphics by a huge amount I am wondering why this hasn't been done before. What is so different between the old way and the new way?</p> <p>I would like to know how it is achieved and maybe even an overview how it works from the gpu to the driver to the API of DX or OGL.</p>