When testing a game fullscreen, it would be incredibly useful to be able to retrieve the framerate as an expression to put in a small text object in the corner. I hear you can do this with events, but it would be easier as an expression.
Couldn't you just tick "FPS in caption" in preferences, or just use timedelta?
Edit I see, you want for full screen, so timedelta it is.
Develop games in your browser. Powerful, performant & highly capable.
Round(1/TimeDelta).
Or just count ticks every second.
+ Always
Add 1 to global('FPS')
+ Every 1000 ms
Set Text to global('FPS') global('FPS') = 0
Set Text to global('FPS')
global('FPS') = 0
That'll be the most accurate representation of FPS, because it counts actual frames.