package { import flash.display.Sprite; import flash.utils.getTimer; import flash.text.TextField; import flash.text.TextFieldAutoSize; import flash.text.TextFormat; import flash.text.TextFormatAlign; [SWF(width = "240",height = "180")] public class addChild_vs_addChildAt extends Sprite { private var n:int = 10000; private var a0:int = 0; private var a1:int = 0; private var sprite0:Sprite = new Sprite(); private var sprite1:Sprite = new Sprite(); private var my_txt:TextField = new TextField(); private var label_txt:TextField = new TextField(); private var my_fmt:TextFormat = new TextFormat(); public function addChild_vs_addChildAt() { // Creating a TextField for display createTextField(); addChild(sprite0); addChild(sprite1); loopTest(); } function loopTest():void { var t0:int = loop0(); var t1:int = loop1(); /* var _str:String = ""; _str += "0: " + t0 + ", "; _str+="1: "+t1+", "; _str+="ratio: "+t0/t1; trace(_str); */ xTrace("addChildAt()", t0); xTrace("addChild()", t1); } 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; } 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; } private function createTextField():void { addChild(my_txt); addChild(label_txt); my_fmt.align = TextFormatAlign.RIGHT; my_txt.x += 50; my_txt.defaultTextFormat = my_fmt; my_txt.autoSize = TextFieldAutoSize.RIGHT; label_txt.autoSize = TextFieldAutoSize.LEFT; } private function xTrace(_str:String, n:int):void { my_txt.appendText(String(n) + "\n"); label_txt.appendText(_str + ":" + "\n"); } } }