Forked from:: Fumio's Testing addChild() vs addChildAt(0)

forked from: flash on 2009-3-5

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lines:52
license : All rights reserved
modified : 2009-04-14 00:50:10

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// forked from Fumio's flash on 2009-3-5
package {
	import flash.display.Sprite;
	import flash.text.TextField;
	import flash.text.TextFieldAutoSize;
	import flash.utils.getTimer;
	public class FlashTest extends Sprite {
		public var _txt:TextField;
		public var sprite0:Sprite;
		public var sprite1:Sprite;
		private var n:int = 10000;
		public function FlashTest() {
			createTestEnvironment();
			loopTest();
		}
		private function createTestEnvironment():void {
			_txt = new TextField();
			_txt.autoSize = TextFieldAutoSize.LEFT;
			_txt.wordWrap = true;
			_txt.width = stage.stageWidth;
			addChild(_txt);
			sprite0 = new Sprite();
			addChild(sprite0);
			sprite1 = new Sprite();
			addChild(sprite1);
		}
		private function loopTest():void {
			var t0:int = loop0();
			var t1:int = loop1();
			var _str:String = "";
			_str += "0: " + t0 + ", ";
			_str+="1: "+t1+", ";
			_str+="ratio: "+t0/t1;
			_txt.text=_str;
		}
		private function loop0():int {
			var t:int=getTimer();
			for (var i:int=0; i<n; i++) {
				var mySprite:Sprite = new Sprite();
				sprite0.addChildAt(mySprite, 0);
			}
			return getTimer() - t;
		}
		private function loop1():int {
			var t:int=getTimer();
			for (var i:int=0; i<n; i++) {
				var mySprite:Sprite = new Sprite();
				sprite1.addChild(mySprite);
			}
			return getTimer() - t;
		}
	}
}

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