Method and systems of visually depicting rendering data are provided. rendering data pertaining to rendering, by a display engine, of display objects in a display zone for a selected frame is accessed. Then, for the selected frame, a heat map is generated based on rendering data corresponding to the selected frame, the heat map containing a plurality of heat objects, each heat object corresponding in proportional size and location to a different display object in the display zone, each heat object displayed in a color having an intensity proportional to an amount of computational resources taken by the display engine to render the corresponding display object. Finally, the heat map is displayed.