Testing addChild() vs addChildAt(0)
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");
}
}
}