5a6ec0f003
Blender's compositor code already makes extensive use of namespace which makes it very simple to enable unity build. There was one duplicated function that has since to be moved to a common header. I saw roughly a 3x speedup of bf_compositor using ninja on linux using i5 8250u (1:34 down to 0:34). Reviewed By: LazyDodo Differential Revision: https://developer.blender.org/D13792