Performence

This mod only uses factorio entities which are hidden from the user. E.g. compact-combinator are running on a different surface and are connected with the normal surface with invisible cables. Therefore there is no performence impact using the entities, because there are all simulated by factorio itself.

Also the color display uses some hidden combinators (1 decider, 1 arithmetic per pixel). So it basically has a 2tick delay before showing your input. But again it's factorio which does the calculation which is much faster than lua script code.