Efficient 2D using OpenGL is very difficult. It will never approach the speed of a well designed 2D API. All web content on OS X and iOS is rendered using Ope

Efficient 2D using OpenGL is very difficult. It will never approach the speed of a well designed 2D API. All web content on OS X and iOS is rendered using OpenGL. That's not to say it was easy to make efficient, but it definitely outperforms the default CoreGraphics implementation on most content.