I know that having overdrawn pixels is not desirable as well as having many polygons since they can decrease performance. Often when I model I have an option to decrease the number of polygons by having disconnected polygons over. For example, considering this: (Let's imagine it has more turns that are not visible in this picture). I can decrease the number of polygons by having a pathway as a single disconnected face: As a result I would have less poly-count, but the bottom geometry would be overdrawn in many areas. Or I can model this as a single continuous mesh. As a result I would have more poly-count, but no overdraw: I very often have similar situations and I'm wondering which of these would be more performance efficient and cause less performance decrease on mobile devices?