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 = 1000000; 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 array:Array = []; var vector1:Vector.<int> = new Vector.<int>(0, false); var vector2:Vector.<int> = new Vector.<int>(_NUM_TIMES, false); var vector3:Vector.<int> = new Vector.<int>(_NUM_TIMES, true); for (var i:uint = 0; i < _NUM_TIMES; i++) { array[i] = 0; vector1[i] = 0; } _measure("ループのみ", function ():void { for (var i:int = 0; i < _NUM_TIMES; i++) { } }); _measure("Array を for で処理", function ():void { var e:int; for (var i:uint = 0, l:uint = array.length; i < l; i++) { e = array[i]; } }); _measure("Array を for each で処理", function ():void { for each (var e:int in array) { } }); _measure("Array を forEach で処理", function ():void { array.forEach(function (e:int, i:int, elements:Array):void { }); }); _measure("Vector.<int>(0, false) を for で処理", function ():void { var e:int; for (var i:uint = 0, l:uint = vector1.length; i < l; i++) { e = vector1[i]; } }); _measure("Vector.<int>(0, false) を for each で処理", function ():void { for each (var e:int in vector1) { } }); _measure("Vector.<int>(0, false) を forEach で処理", function ():void { vector1.forEach(function (e:uint, i:uint, elements:Vector.<int>):void { }); }); _measure("Vector.<int>(" + _NUM_TIMES + ", false) を for で処理", function ():void { var e:int; for (var i:uint = 0, l:uint = vector2.length; i < l; i++) { e = vector2[i]; } }); _measure("Vector.<int>(" + _NUM_TIMES + ", false) を for each で処理", function ():void { for each (var e:uint in vector2) { } }); _measure("Vector.<int>(" + _NUM_TIMES + ", false) を forEach で処理", function ():void { vector2.forEach(function (e:int, i:int, elements:Vector.<int>):void { }); }); _measure("Vector.<int>(" + _NUM_TIMES + ", true) を for で処理", function ():void { var e:int; for (var i:uint = 0, l:uint = vector3.length; i < l; i++) { e = vector3[i]; } }); _measure("Vector.<int>(" + _NUM_TIMES + ", true) を for each で処理", function ():void { for each (var e:int in vector3) { } }); _measure("Vector.<int>(" + _NUM_TIMES + ", true) を forEach で処理", function ():void { vector3.forEach(function (e:int, i:int, elements:Vector.<int>):void { }); }); _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(); }); } } }