MetalImage is more faster and powerful than opengles for iOS. It is very similar to GPUImage framework, but perform a better 3D rendering and multithreads computing abilities.
@stayHF ,
Yes, I try to give details for comparison between two lib.
But I had tried to compare some gaussian algorithm for beauty face , Metal can give a 30 FPS ,and Opengles just give 23 FPS on iPhone 6s.
Thanks from EK