Well, all the pathfinding and at least some of the map rendering is being done server-side, and the 3D drawing is mostly offloaded to the GPU. So I would actual

Well, all the pathfinding and at least some of the map rendering is being done server-side, and the 3D drawing is mostly offloaded to the GPU. So I would actually be surprised if the CPU was working hard for Nav. My guess is that a lot of the power suck during navigation comes from: - Keeping the screen on - Constantly reading the GPS - Loading new map tiles, traffic data, etc over the radio - GPU rendering at 30fps or so