ParentもSprite,MovieClipに分けて速度比較

/**
 * Copyright coppieee ( http://wonderfl.net/user/coppieee )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/6yGW
 */

// forked from clockmaker's [最適化 Tips] SpriteとMovieClipってそんなに変わるの？
// forked from muta244's [最適化 Tips] 変数名の長さによる処理速度の違い
package {

import flash.display.*;
import flash.events.*;
import flash.text.*;
import flash.utils.*;
import flash.system.*;

public class Main extends Sprite
{
		static private const _NUM_TIMES:uint = 2000;
		
		//private var wrap:Sprite;
		
		private function _init():void
		{
			
			//while(wrap.numChildren) wrap.removeChildAt(0);
			
			_debug(
				"各テスト " + _NUM_TIMES + " 回処理させた計算結果 [単位 ： ミリ秒]\n" +
				"(誤差は多少生じます)\n"
			);
			
			_debug("");
			
			System.gc();
			var wrapMc:MovieClip = new MovieClip();
			addChild(wrapMc);
			var old1:int = System.totalMemory;
			_measure("MovieClip", function ():void
			{
				for (var i:uint = 0; i < _NUM_TIMES; i++) {
					var mc:MovieClip = new MovieClip();
					wrapMc.addChild(mc)
				}
			});
			_debug("(MovieClipのメモリ使用量 : " + int((System.totalMemory - old1)/1000) + "KB");
			removeChild(wrapMc);
			
			System.gc();
			var wrapSp:Sprite = new Sprite();
			addChild(wrapSp);
			var old:int = System.totalMemory;
			_measure("Sprite", function ():void
			{
				for (var i:uint = 0; i < _NUM_TIMES; i++) {
					var sp:Sprite = new Sprite();
					wrapSp.addChild(sp)
				}
			});
			_debug("(Spriteのメモリ使用量 : " + int((System.totalMemory - old)/1000) + "KB");
			removeChild(wrapSp);
			
			_debug("\n結果については言及しませんので, 各自ご判断ください.");
		}
		
		private var _field:TextField;
		private var _time:uint;
		
		public function Main():void
		{
			_setup();
			_init();
		}
		
		private function _measure(title:String, func:Function, ...params):void
		{
			_time = getTimer();
			func.apply(null, params);
			_time = getTimer() - _time;
			
			_debug("[ " + title + " ] --> " + _time + " ms");
		}
		
		private function _debug(log:String):void
		{
			_field.appendText(log + "\n");
		}
		
		private function _setup():void
		{
			//wrap = new Sprite
			//addChild(wrap)
			
			_field = new TextField();
			_field.width = stage.stageWidth - 40;
			_field.height = stage.stageHeight - 60;
			_field.x = 20;
			_field.y = 60;
			
			var format:TextFormat = _field.defaultTextFormat;
			format.font = "_sans";
			_field.defaultTextFormat = format;
			
			addChild(_field);
			
			var button:Sprite = new Sprite();
			button.graphics.lineStyle(1, 0xBBBBBB);
			button.graphics.beginFill(0xEEEEEE);
			button.graphics.drawRoundRect(0, 0, 100, 20, 5, 5);
			button.graphics.endFill();
			
			addChild(button);
			
			button.x = 20;
			button.y = 20;
			button.mouseChildren = false;
			button.buttonMode = true;
			
			var field:TextField = new TextField();
			field.width = 100;
			field.height = 20;
			field.htmlText = "<p align='center'><font face='_sans'>再計算</span></p>";
			
			button.addChild(field);
			
			button.addEventListener(MouseEvent.CLICK, function ():void
			{
				_field.text = "";
				_init();
			});
		}
	}
}