ところでいろんなオブジェクトを作るのってどのくらい重いんだっけ

/**
 * Copyright kaikoga ( http://wonderfl.net/user/kaikoga )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/gN6N
 */

package {
	
	import flash.display.Sprite;
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.text.TextField;
	import flash.text.TextFormat;
	import flash.utils.ByteArray;
	
	public class FlashTest extends Sprite {
		
		public function FlashTest() {
			check();
			var button:SpriteButton = new SpriteButton(100, 20, "再計算");
			this.addChild(button);
			button.y = this.stage.stageHeight - button.height;
			button.addEventListener(MouseEvent.CLICK, this.button_clickHandler);
		}
		
		private function button_clickHandler(event:MouseEvent):void {
			clearTrace();
			this.check();
		}
		
		public function check():void {
			const ITER:int = 50000;
			measure("空ループ", function():void {
				for (var i:int = 0; i < ITER; i++) {
					;
				}
			});
			measure("Object", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:Object = {};
				}
			});
			measure("Array", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:Array = [];
				}
			});
			measure("ByteArray", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:ByteArray = new ByteArray();
				}
			});
			measure("Date", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:Date = new Date();
				}
			});
			measure("XML", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:XML = new XML();
				}
			});
			measure("Error", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:Error = new Error();
				}
			});
			measure("Event", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:Event = new Event("");
				}
			});
			measure("Sprite", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:Sprite = new Sprite();
				}
			});
			measure("MovieClip", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:MovieClip = new MovieClip();
				}
			});
			measure("TextField", function():void {
				for (var i:int = 0; i < ITER; i++) {
					var o:TextField = new TextField();
				}
			});
		}
		
		private var _measureDate:Date;
		private var _measureTitle:String;
		public function startMeasure(title:String):void {
			this._measureDate = new Date();
			this._measureTitle = title;
		}
		public function endMeasure():void {
			var ms:Number = new Date().time - this._measureDate.time;
			this.trace(this._measureTitle, ":", ms + "ms");
		}
		public function measure(title:String, func:Function):void {
			this.startMeasure(title);
			func();
			this.endMeasure();
		}
		
		private var _traceField:TextField;
		public function trace(...message):void {
			if (!this._traceField) {
				this._traceField = new TextField();
				this._traceField.width = this.stage.stageWidth;
				this._traceField.height = this.stage.stageHeight;
				this._traceField.defaultTextFormat = new TextFormat("_typewriter", 10);
				this.addChild(this._traceField);
			}
			this._traceField.appendText(message.join(" ") + "\n");
		}
		
		public function clearTrace():void {
			if (this._traceField) {
				this._traceField.text = "";
			}
		}
		
	}

}

import flash.display.Sprite;
import flash.text.TextField;
import flash.text.TextFormat;

class SpriteButton extends Sprite {

	public function SpriteButton(width:Number, height:Number, text:String):void {
		super();
		
		this.graphics.lineStyle(1, 0x664422);
		this.graphics.beginFill(0xffcc99);
		this.graphics.drawRoundRect(0, 0, width, height, 8);
		
		var textField:TextField = new TextField();
		textField.width = width;
		textField.height = height;
		textField.defaultTextFormat = new TextFormat("_typewriter", 10, null, null, null, null, null, null, "center");
		textField.text = text;
		this.addChild(textField);
		
		this.mouseChildren = false;
		this.buttonMode = true;
	}
	
}