GameMaker One big tileset or multiple tile layers?

[Kyrieru]

Which is faster?

1. Large tilesets with fewer tile layers in rooms.
2. Multiple Smaller tile sets, but having more tile layers.

If tilesets are split up more, then I need more tile layers . On the other hand if everything is in one gigantic tileset, there would be few tile layers but more tile numbers/indexes per layer. Anybody know which is better for performance as a general rule of thumb?

 

[dannyjenn]

My guess is that less layers is probably faster than more layers. But that's only a guess.

My thinking is that each tile layer is probably rendered separately (as something like a surface), and then these layer/surface things are probably drawn one on top of the other. So less layers would require less drawing and be faster. But I have no idea really.