..after installing python3 (latest Cin-GG uses it for somescript during build process). Default optimizations ("-O2, -fPIC") resulted in 22 fps playback with color3way effect enabled over 1280x720 (RGBA-8 color format in project - default) video. Upgrading optimizations to "-O3 -ffast-math -march=native -mtune=native -fPIC" resulted in 30 fps playback! Switching video output to OpenGL resulted in less fps. At most 64-bit Cin-GG can play two 1280x720 h264 MOV videos one on top of another, where one video with color3way effect and another - 50% transparent. 22 fps :} I'm still not sure if resulted Cin-GG compilation actually correct (mathematically-speaking). You can compile 'normal' and 'optimized' version and just swap some plugins, even one-by one and see if they still work correctly?