JacksonDunstan.com

package
{
	import flash.display.*;
	import flash.utils.*;
	import flash.text.*;
 
	public class XMLOperatorVsMethod extends Sprite
	{
		private var logger:TextField = new TextField();
		private function row(...cols): void
		{
			logger.appendText(cols.join(",") + "\n");
		}
 
		private static var XML_OBJ:XML = <a b="x"><d><f/></d></a>;
		private static var PLAIN_OBJ:Object = { b:"x" };
		private static var TYPED_OBJ:TypedObj;
 
		public function XMLOperatorVsMethod()
		{
			stage.align = StageAlign.TOP_LEFT;
			stage.scaleMode = StageScaleMode.NO_SCALE;
 
			logger.autoSize = TextFieldAutoSize.LEFT;
			addChild(logger);
 
			XML_OBJ = <a b="x"/>;
			PLAIN_OBJ = { b:"x" };
			TYPED_OBJ = new TypedObj();
 
			init();
		}
 
		private function init(): void
		{
			const REPS:int = 1000000;
			var i:int;
			var beforeTime:int;
			var afterTime:int;
 
			row("Operation", "Time");
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.@b;
			}
			afterTime = getTimer();
			row("XML Attribute Exists (E4X)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.@c;
			}
			afterTime = getTimer();
			row("XML Attribute Does Not Exist (E4X)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.d;
			}
			afterTime = getTimer();
			row("XML Element Exists (dot) (E4X)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.e;
			}
			afterTime = getTimer();
			row("XML Element Does Not Exist (dot) (E4X)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ..f;
			}
			afterTime = getTimer();
			row("XML Descendent Exists (E4X)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ..g;
			}
			afterTime = getTimer();
			row("XML Descendent Does Not Exist (E4X)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.attribute("b");
			}
			afterTime = getTimer();
			row("XML Attribute Exists (Method)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.attribute("c");
			}
			afterTime = getTimer();
			row("XML Attribute Does Not Exist (Method)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.elements("d");
			}
			afterTime = getTimer();
			row("XML Element Exists (dot) (Method)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.elements("e");
			}
			afterTime = getTimer();
			row("XML Element Does Not Exist (dot) (Method)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.descendants("f");
			}
			afterTime = getTimer();
			row("XML Descendent Exists (Method)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ.descendants("g");
			}
			afterTime = getTimer();
			row("XML Descendent Does Not Exist (Method)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ["d"];
			}
			afterTime = getTimer();
			row("XML Element Exists (bracket)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				XML_OBJ["e"];
			}
			afterTime = getTimer();
			row("XML Element Does Not Exist (bracket)", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				PLAIN_OBJ.b;
			}
			afterTime = getTimer();
			row("Plain Object Exists", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				PLAIN_OBJ.c;
			}
			afterTime = getTimer();
			row("Plain Object Does Not Exist", (afterTime-beforeTime));
 
			beforeTime = getTimer();
			for (i = 0; i < REPS; ++i)
			{
				TYPED_OBJ.b;
			}
			afterTime = getTimer();
			row("Typed Object Exists", (afterTime-beforeTime));
 
			row("Typed Object Does Not Exist", 0);
		}
	}
}
class TypedObj
{
	public var b:String = "x";
}