package  
{
	import flash.display.Sprite;
 
	public class Test extends Sprite 
	{
		public var testSprite1:Sprite = new TestSprite1(),
					testSprite2:Sprite = new TestSprite2(),
					testSprite3:Sprite = new TestSprite3(),
					testSprite4:Sprite = new TestSprite4();
		public var current:Sprite;
		public var i:Number;
 
		public function Test()
		{
			current = testSprite4;
			trace(new PerformanceComparison(1000000, test1, test2, test3, test4).start());
		}
 
		protected function test1():void 
		{
			if (current.name == "sprite1") 
			{
				i = 1;
			}
			else if (current.name == "sprite2") 
			{
				i = 2;
			}
			else if (current.name == "sprite3") 
			{
				i = 3;
			}
			else if (current.name == "sprite4")
			{
				i = 4;  
			}
		}
 
		protected function test2():void 
		{
			switch (current.name) 
			{ 
				case "sprite1" :					
					{
					i = 1;
					break;
					}
				case "sprite2" :
					{
					i = 2;
					break; 
					}
				case "sprite3" :
					{
					i = 3;
					break; 
					}
				case "sprite4" :
					{
					i = 4;
					break; 
					}
			}
		}
 
		protected function test3():void 
		{
			if (current is TestSprite1) 
			{
				i = 1;
			}
			else if (current is TestSprite2) 
			{
				i = 2;
			}
			else if (current is TestSprite3) 
			{
				i = 3;
			}
			else if (current is TestSprite4) 
			{
				i = 4;
			}
		}
 
		protected function test4():void 
		{
			switch (true) 
			{ 
				case (current is TestSprite1) :					
					{
					i = 1;
					break;
					}
				case (current is TestSprite2) :
					{
					i = 2;
					break; 
					}
				case (current is TestSprite3) :
					{
					i = 3;
					break; 
					}
				case (current is TestSprite4) :
					{
					i = 4;
					break; 
					}
			}
		}
	}
}
 
import flash.display.Sprite;
 
internal class TestSprite1 extends Sprite
{
	public function TestSprite1()
	{
		name = "sprite1";
	}
}
 
internal class TestSprite2 extends Sprite
{
	public function TestSprite2()
	{
		name = "sprite2";
	}
}
 
internal class TestSprite3 extends Sprite
{
	public function TestSprite3()
	{
		name = "sprite3";
	}
}
 
internal class TestSprite4 extends Sprite
{
	public function TestSprite4()
	{
		name = "sprite4";
	}
}