
Add a chart at the bottom 10% of the screen where each bar represents the time the frame took to be painted. The red line represents the maximum time to draw. For example, if you are on a 60Hz monitor, the red line means 16.6667 miliseconds. This covers both layout time (green) and paint time (blue). Enjoy. https://gitlab.gnome.org/GNOME/mutter/merge_requests/502