// forked from muta244's [最適化 Tips] オブジェクト生成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:uint = 50000; 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" ); var object:Object; var array:Array; _measure("ループのみ", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { } }); _measure("new Object() で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var object:Object = new Object(); } }); _measure("{} で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var object:Object = {}; } }); _measure("new Array() で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var array:Array = new Array(); } }); _measure("[] で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var array:Array = []; } }); _measure("new Vector.<int>() で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>(); } }); _measure("new Vector.<int>(0, true) で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>(0, true); } }); _measure("【新規】new Vector.<int>([]) で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>([]); } }); _measure("【新規】new Vector.<int>(30, true) で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>(30, true); } }); _measure("【新規】new Vector.<int>(30, false) で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>(30, false); } }); _measure("【新規】new Vector.<int>([0,1, ... ,8,9]) リテラル30個で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>([0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9,0,1,2,3,4,5,6,7,8,9]); } }); _measure("new Vector.<int>(1000, true) で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>(1000, true); } }); _measure("new Vector.<int>(2000, true) で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var vector:Vector.<int> = new Vector.<int>(2000, true); } }); _measure("new Point() で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var point:Point = new Point(); } }); _measure("new Rectangle() で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var rectangle:Rectangle = new Rectangle(); } }); _measure("new Matrix() で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var matrix:Matrix = new Matrix(); } }); _measure("new Sprite() で生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var sprite:Sprite = new Sprite(); } }); _measure("new Test() で独自クラス生成", function ():void { for (var i:uint = 0; i < _NUM_TIMES; i++) { var test:Test = new Test(); } }); _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; _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(); }); } } } internal class Test { }