benchmark.cs

namespace C_Sharp_Benchmarker
{
	class Program
	{
		private static int testIterations = 10000000;

		public static void Main(string[] args)
		{
			var t1 = Test1();
			var t2 = Test2();

			if (t1 < t2) Console.WriteLine("Test 1 is " + ((t2 / t1) * 100).ToString() + "% faster than test 2.");
			if (t2 < t1) Console.WriteLine("Test 2 is " + ((t1 / t2) * 100).ToString() + "% faster than test 1.");
		}

		public static decimal Test1()
		{
			Console.Write("Running test 1.....");

			Stopwatch s = new Stopwatch();

			s.Start();

			for (int i = 0; i < testIterations; i++)
			{
				TestMethod1();
			}

			s.Stop();

			Console.WriteLine("Duration: " + s.ElapsedMilliseconds.ToString() + " milliseconds");

			return s.ElapsedMilliseconds;
		}

		public static decimal Test2()
		{
			Console.Write("Running test 2.....");

			Stopwatch s = new Stopwatch();

			s.Start();

			for (int i = 0; i < testIterations; i++)
			{
				TestMethod2();
			}

			s.Stop();

			Console.WriteLine("Duration: " + s.ElapsedMilliseconds.ToString() + " milliseconds");

			return s.ElapsedMilliseconds;
		}

		public static void TestMethod1()
		{
			var myList = new List<string> { "12", "13", "14" };
			string myString = String.Join(",", myList);
		}

		public static void TestMethod2()
		{
			var myList = new List<string> { "12", "13", "14" };
			var myString = "";
			var sb = new System.Text.StringBuilder();

			foreach (string s in myList)
			{
				sb.Append(s);
				sb.Append(",");
			}

			myString = sb.ToString();

			myString = myString.Substring(0, myString.Length - 1);
		}
	}

}