Stats

The Stats panel gives you some stats about the current scene relating to performance.

FPS
Frames per second.
Draw Calls
The number of draw calls done per frame. For performance, try keeping this number down.
Entities
The number of entities currently in the viewport.
Lights
The current number of lights in the scene. Try keeping this number down for performance.
Shadow casters
The number of shadow casters in the scene.
Shaders
The number of shaders. Try keeping this number down.
Texture Size
Current texture size in the GPU.
Triangles
Current number of rendered triangles.