package { import flash.display.*; import flash.events.*; import flash.text.*; import flash.utils.*; public class Main extends Sprite { static private const _NUM_TIMES:uint = 1000000; private var _a:String = "test"; private var _abcdefghijklmnopqrstuvwsyzabcdefghijklmnopqrst:String = "test"; private function _init():void { _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" ); _measure("ループのみ", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { } }); _measure("変数名が短いプロパティ参照", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { _a; } }); _measure("変数名が長いプロパティ参照", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { _abcdefghijklmnopqrstuvwsyzabcdefghijklmnopqrst; } }); _measure("変数名が短いプロパティのハッシュ参照", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { this["_a"]; } }); _measure("変数名が長いプロパティのハッシュ参照", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { this["_abcdefghijklmnopqrstuvwsyzabcdefghijklmnopqrst"]; } }); _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 { _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(); }); } } }