Posted by Xerxes Rånby on Nov 18, 2012; 12:09am
URL: https://forum.jogamp.org/glsl-optimizer-OpenGL-ES-2-GLSL-Shader-optimizer-based-on-Mesa-s-GLSL2-compiler-tp4027028.html

https://github.com/aras-p/glsl-optimizer

"Apparently quite a few mobile platforms are pretty bad at optimizing GLSL shaders; and unfortunately they also lack offline shader compilers. So using a GLSL optimizer offline before can make the shader run much faster on a platform like that. See performance numbers in this blog post." http://aras-p.info/blog/2010/09/29/glsl-optimizer/
"Yep, it’s 236 vs. 36 milliseconds/frame (4 vs. 27 FPS)."