using System;

using System.Diagnostics;

using System.Text;

using System.Text.RegularExpressions;

​

public class Program

{

    private static void Benchmark(Action act, int iterations)

    {

        GC.Collect();

        act.Invoke(); // run once outside of loop to avoid initialization costs

        Stopwatch sw = Stopwatch.StartNew();

        for (int i = 0; i < iterations; i++)

        {

            act.Invoke();

        }

        sw.Stop();

        Console.WriteLine("Elapsed ticks:"+(sw.ElapsedTicks).ToString());

    }

​

    private static string Variation = "[\"B\",\"(15,3)\"],[\"W\",\"(3,15)\"],[\"B\",\"(16,15)\"],[\"W\",\"(3,3)\"],[\"B\",\"(13,16)\"],[\"W\",\"(16,2)\"],[\"B\",\"(16,3)\"],[\"W\",\"(15,2)\"],[\"B\",\"(14,3)\"],[\"W\",\"(14,2)\"],[\"B\",\"(13,3)\"],[\"W\",\"(13,2)\"],[\"B\",\"(15,9)\"],[\"W\",\"(12,3)\"],[\"B\",\"(12,4)\"],[\"W\",\"(11,4)\"],[\"B\",\"(11,5)\"],[\"W\",\"(11,3)\"],[\"B\",\"(12,5)\"],[\"W\",\"(15,15)\"],[\"B\",\"(15,16)\"],[\"W\",\"(14,15)\"],[\"B\",\"(14,16)\"],[\"W\",\"(16,14)\"],[\"B\",\"(17,15)\"],[\"W\",\"(16,11)\"],[\"B\",\"(15,13)\"],[\"W\",\"(14,11)\"],[\"B\",\"(13,15)\"],[\"W\",\"(17,9)\"],[\"B\",\"(16,8)\"],[\"W\",\"(17,8)\"],[\"B\",\"(17,7)\"],[\"W\",\"(16,9)\"],[\"B\",\"(15,7)\"],[\"W\",\"(12,11)\"],[\"B\",\"(13,12)\"],[\"W\",\"(13,11)\"],[\"B\",\"(16,13)\"],[\"W\",\"(10,11)\"],[\"B\",\"(14,10)\"],[\"W\",\"(15,10)\"],[\"B\",\"(9,15)\"],[\"W\",\"(5,16)\"]";

    private static string pattern = "[" + Regex.Escape("][()\"") + "]";

    private static char[] charsToRemove = {'[', ']', '(', ')', '\"'};

    public static void Main(string[] args)

    {   

        Benchmark(() => { string result = Variation

            .Replace("[", "")

            .Replace("]", "")

            .Replace("(", "")

            .Replace(")", "")

            .Replace("\"", "");

                        }, 100000);

        Benchmark(() => { 

            string[] temp = Variation.Split(charsToRemove, StringSplitOptions.RemoveEmptyEntries);

            string result = String.Join(String.Empty, temp);

                        }, 100000);

        Benchmark(() => { 

            string result = Regex.Replace(Variation, pattern, "");

                        }, 100000);

    }

}