Here's a comparison between OpenGL and Metal. OpenGL 4.1: <img width="774" alt="screen shot 2017-11-27 at 1 10 05 pm" src="https://user-images.githubusercontent.com/11932586/33264122-f524f802-d374-11e7-9860-68511b68266d.png"> Metal: <img width="588" alt="screen shot 2017-11-27 at 1 09 43 pm" src="https://user-images.githubusercontent.com/11932586/33264139-00a3fbe2-d375-11e7-9b3e-5df2eaa06c44.png">
