関数呼び出しは重く、入れ子の関数は更に重い
/**
* Copyright kaikoga ( http://wonderfl.net/user/kaikoga )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/dTXd
*/
// 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();
});
}
}
}