Pointless string replace benchmark. Just for fun

pointless_1321343.cs

namespace ConsoleApplication1
{
  using System;
	using System.Diagnostics;
	using System.Text;

	internal class Program
	{

		const string TestData = "Some Random Place & Some' Chars. ";
		const int Iterations = 1000000;

		private static void Main(string[] args)
		{
			Test(BenchmarkOverhead);
			Test(StringCleanA);
			Test(StringCleanB);
			Console.ReadLine();
		}

		static void Test(Func<string, bool> function)
		{
			Console.Write("{0}... ", function.Method.Name);
			Stopwatch sw = Stopwatch.StartNew();
			for (int i = 0; i < Iterations; i++)
			{
				function(TestData);
			}
			sw.Stop();
			Console.WriteLine(" {0}ms", sw.ElapsedMilliseconds);
			GC.Collect();
		}

		private static bool BenchmarkOverhead(string str)
		{
			return true;
		}

		private static bool StringCleanA(string str)
		{
			StringExtensionA.Clean(str);
			return true;
		}

		private static bool StringCleanB(string str)
		{
			StringExtensionB.Clean(str);
			return true;
		}

	}


	public static class StringExtensionA
	{
		public static string Clean(string s)
		{
			return (new StringBuilder(s)).Replace("&", "and").Replace(",", "")
			                             .Replace("  ", " ").Replace(" ", "-").Replace("'", "")
			                             .Replace(".", "").Replace("eacute;", "é").ToString().ToLower();
		}
	}

	public static class StringExtensionB
	{
		public static string Clean(string s)
		{
			StringBuilder sb = new StringBuilder(s);

			sb.Replace("&", "and");
			sb.Replace(",", "");
			sb.Replace("  ", " ");
			sb.Replace(" ", "-");
			sb.Replace("'", "");
			sb.Replace(".", "");
			sb.Replace("eacute;", "é");

			return sb.ToString().ToLower();
		}
	}
}

results.txt

BenchmarkOverhead...  14ms
StringCleanA...  2943ms
StringCleanB...  2901ms

BenchmarkOverhead...  13ms
StringCleanA...  2937ms
StringCleanB...  2924ms

BenchmarkOverhead...  13ms
StringCleanA...  2919ms
StringCleanB...  2892ms

BenchmarkOverhead...  13ms
StringCleanA...  2907ms
StringCleanB...  2876ms

Tests repeated 4 times to give a mean.