// forked from tail_y's forked from: [最適化 Tips] Number, int, uint の計算による処理速度の違い // forked from muta244's [最適化 Tips] Number, int, uint の計算による処理速度の違い package { import flash.display.*; import flash.geom.*; import flash.events.*; import flash.text.*; import flash.utils.*; public class Main extends Sprite { static private const _NUM_TIMES:int = 200000; private function _emptyFunc():void { ; } private var i:int = 0; private function get _getter():int { return this.i; } private function _test2():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var o:int = this._getter; } } private function _test3():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { this._emptyFunc(); } } 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("文字列を捨てるループ", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { "String"; } }); _measure("文字列を代入するループ", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var str:String = "String"; } }); _measure("XMLリテラルを捨てるループ", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { <root />; } }); _measure("XMLリテラルを代入するループ", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var xml:XML = <root />; } }); _measure("暗黙のメンバ関数呼び出し", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { _emptyFunc(); } }); _measure("this付きのメンバ関数呼び出し", this._test3); _measure("暗黙のgetter呼び出し", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var o:int = _getter; } }); _measure("this付きのgetter呼び出し", function ():void { this._test2(); }); _measure("直接this付きのgetter呼び出し", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var o:int = this._getter; } }); _measure("apply()経由でthis付きのメンバ関数呼び出し", function ():void { this._test3() }); _measure("apply()経由で直接this付きのメンバ関数呼び出し", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { this._emptyFunc(); } }); _measure("変数に代入したメンバ関数呼び出し", function ():void { var func:Function = _emptyFunc; for (var i:uint = 0; i < _NUM_TIMES; i++) { func(); } }); _measure("匿名関数呼び出し", function ():void { var func:Function = function():void { ; }; for (var i:uint = 0; i < _NUM_TIMES; i++) { func(); } }); _measure("文字列リテラルを捨てる匿名関数呼び出し", function ():void { var func:Function = function():void { "String" }; for (var i:uint = 0; i < _NUM_TIMES; i++) { func(); } }); _measure("文字列リテラルを返す匿名関数呼び出し", function ():void { var func:Function = function():String { return "String" }; for (var i:uint = 0; i < _NUM_TIMES; i++) { var str:String = func(); } }); _measure("XMLリテラルを捨てる匿名関数呼び出し", function ():void { var func:Function = function():void { <hoge /> }; for (var i:uint = 0; i < _NUM_TIMES; i++) { func(); } }); _measure("XMLリテラルを返す匿名関数呼び出し", function ():void { var func:Function = function():XML { return <hoge /> }; for (var i:uint = 0; i < _NUM_TIMES; i++) { var xml:XML = func(); } }); _measure("入れ子の匿名関数を捨てる呼び出し", function ():void { var func:Function = function():void { (function():void { ; }) }; for (var i:uint = 0; i < _NUM_TIMES; i++) { func(); } }); _measure("入れ子の匿名関数を呼び出す匿名関数呼び出し", function ():void { var func:Function = function():void { (function():void { ; })() }; for (var i:uint = 0; i < _NUM_TIMES; i++) { func(); } }); _debug("\n結果を説明するスペースなんてなかった"); } 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(this, 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; _field.multiline = true; _field.wordWrap = true; 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(); }); } } }