Plane Processing

This question is about how much processing power the planes in unity use. I created a small level in unity using cubes and got a decent frame rate. I then realized if I use planes instead of cubes I would get a better frame rate but, the frame rate dropped by at least 10 fps. Why did this happen?

One Unity built-in plane is 200 triangles as opposed to the 12 triangles of the built-in cube. Whether this is why your performance dropped, I can’t say for sure.