package {
	import flash.display.MovieClip;
	import flash.text.TextField;
	import flash.events.Event;
	import flash.utils.getTimer;

	public class FPSDemo extends MovieClip {
		public var startTime:Number;
		public var framesNumber:Number=0;
		public var fps:TextField = new TextField();

		public function FPSDemo() {
			fpsCounter();
		}

		public function fpsCounter():void {
			startTime=getTimer();
			addChild(fps);

			addEventListener(Event.ENTER_FRAME, checkFPS);
		}

		public function checkFPS(e:Event):void {
			var currentTime:Number = (getTimer() - startTime) / 1000;

			framesNumber++;

			if (currentTime>1) {
				fps.text = "FPS:" + (Math.floor((framesNumber/currentTime)*10.0)/10.0);
				startTime=getTimer();
				framesNumber=0;
			}
		}
	}
}