Lynda – Unity 5 2D: Optimizing Graphics

Faster graphics make better video games. Learn how to use Unity 5's tools to improve the performance of your 2D graphics by optimizing draw calls to the CPU. These tutorials from expert game developer Jesse Freeman cover analyzing your graphics with the Profiler, viewing individual draw calls with the Frame Debugger, and optimizing textures and the UI layout of your game to improve rendering times and performance during gameplay.

http://www.lynda.com/Unity-tutorials/Unity-5-2D-Optimizing-Graphics/444841-2.html