Simplest Component Test.cs

using System;
using System.Diagnostics;

namespace NamedArgsSpeedTest
{
	class Program
	{
		static void Main(string[] args)
		{
			for (int i = 0; i < 100; i++)
			{
				ConductPerfTest();
			}

			Console.ReadKey();
		}

		private static void ConductPerfTest()
		{
			var testObject = new TestClass(3, 5, 6);

			var sw = new Stopwatch();
			sw.Start();

			for (int i = 0; i < 1000000; i++)
			{
				testObject.SetSomeValuesClassicaly(5, 3, 6);
			}

			sw.Stop();
			Console.WriteLine("Classic " + sw.ElapsedMilliseconds);

			sw.Reset();
			sw.Start();

			for (int i = 0; i < 1000000; i++)
			{
				testObject.SetSomeValuesNamed(x: 51);
			}

			sw.Stop();
			Console.WriteLine("Named " + sw.ElapsedMilliseconds);
			Console.WriteLine();
		}
	}
}

namespace NamedArgsSpeedTest
{
	public class TestClass
	{
		public int x;
		public int y;
		public int z;

		public TestClass()
		{
		}

		public TestClass(int x, int y, int z)
		{
			this.x = x;
			this.y = y;
			this.z = z;
		}

		public void SetSomeValuesClassicaly(int x, int y, int z)
		{
			this.x = x;
			this.y = y;
			this.z = z;
		}

		public void SetSomeValuesNamed(int? x = null, int? y = null, int? z = null)
		{
			this.x = x.GetValueOrDefault(this.x);
			this.y = y.GetValueOrDefault(this.y);
			this.z = z.GetValueOrDefault(this.z);
		}
	}
}