An alternative FPS counter that even your shaders can now impact

fpsClock.gml

/* TabularElf made this! 
Use case:

Insert fpsClock().tick(); within the begin step event of your game management object. (And never in a loop)

You may retrieve the FPS value by calling fpsClock() anytime to return a string value of the FPS.
*/
function __getFPSClockSingleton() {
	static _clockStruct = new (function() constructor {
		static __FPSMain = game_get_speed(gamespeed_fps);
		static __AFT = game_get_speed(gamespeed_microseconds);
		static __Time = get_timer();
		static __oldTime = 0;
		static __nFrames = 0;
		static __prevFPS = 0;
		static __nextFrame = __Time;
		
		static tick = function() {
			var _currentTime = get_timer();
			
			if (_currentTime > __nextFrame) {
				__nextFrame = _currentTime+1000;
				++__nFrames;
				if (_currentTime - __Time > 1000000) {
					var _oldTime = __Time;
					__Time = _currentTime;
					__prevFPS = min(__nFrames, __FPSMain);
					__nFrames = 0;
				}
			}
			return self;
		}
		
		static setFPS = function(_fps, _type) {
				game_set_speed(_fps, _type);
				static __FPSMain = game_get_speed(gamespeed_fps);
				static __AFT = game_get_speed(gamespeed_microseconds);
		}
		
		static toString = function() {
			return string(__prevFPS);	
		}
	})();
	
	return _clockStruct;
}

function fpsClock() {
	return __getFPSClockSingleton();	
}