using System;

using System.Linq;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string arr1 = "";

        string arr2 = "a;b;c;d;e";

        string arr3 = "aaaa;bbbbb;ccccc;ddddd;eeeee;fffff;ggggg";

        string arr4 = "aaaa;bbbbb;ccccc;ddddd;eeeee;fffff;ggggg;hhhhh;iiiii;jjjjj;kkkkk;lllll;mmmmm;nnnnn;ooooo;ppppp;qqqqq;rrrrr;sssss;ttttt;uuuuu;vvvvv;wwwww;xxxxx;yyyyy;zzzzz;aaaa;bbbbb;ccccc;ddddd;eeeee;fffff;ggggg;hhhhh;iiiii;jjjjj;kkkkk;lllll;mmmmm;nnnnn;ooooo;ppppp;qqqqq;rrrrr;sssss;ttttt;uuuuu;vvvvv;wwwww;xxxxx;yyyyy;zzzzz;aaaa;bbbbb;ccccc;ddddd;eeeee;fffff;ggggg;hhhhh;iiiii;jjjjj;kkkkk;lllll;mmmmm;nnnnn;ooooo;ppppp;qqqqq;rrrrr;sssss;ttttt;uuuuu;vvvvv;wwwww;xxxxx;yyyyy;zzzzz";

        System.Diagnostics.Stopwatch sw = System.Diagnostics.Stopwatch.StartNew();

​

        for (int i = 0; i < 100000; i++)

        {

            test1(arr1, ';');

            test1(arr2, ';');

            test1(arr3, ';');

            test1(arr4, ';');

        }

        sw.Stop();

        Console.WriteLine("Execution time 1: {0} ms", sw.ElapsedMilliseconds);

        sw.Reset();

        sw.Start();

        // Call the function to be tested.

        for (int i = 0; i < 100000; i++)

        {

            test2(arr1, ';', 6);

            test2(arr2, ';', 6);

            test2(arr3, ';', 6);

            test2(arr4, ';', 6);

        }

        sw.Stop();

        Console.WriteLine("Execution time 2: {0} ms", sw.ElapsedMilliseconds);

        sw.Reset();

        sw.Start();

        // Call the function to be tested.

        for (int i = 0; i < 100000; i++)

        {

            test3(arr1, ';');

            test3(arr2, ';');

            test3(arr3, ';');

            test3(arr4, ';');

        }

        sw.Stop();

        Console.WriteLine("Execution time 3: {0} ms", sw.ElapsedMilliseconds);

    }

    public static int test1(string arr, char splitChar)

    {

        int count = 1;

        int index = 0;

        while (index < arr.Length)

        {

            int charIndex = arr.IndexOf(splitChar, index);

            if (charIndex < 0)

            {

                break;

            }

            count++;

            index = charIndex + 1;

        }

        return count;

    }

    public static int test2(string arr, char splitChar, int maximum = -1)

    {

        int count = 1;

        int index = 0;

        while (index < arr.Length && count <= maximum)

        {

            int charIndex = arr.IndexOf(splitChar, index);

            if (charIndex < 0)

            {

                break;

            }

            count++;

            index = charIndex + 1;

        }

        return count;

    }

    public static int test3(string arr, char splitChar)

    {

        return arr.Split(splitChar).Length;

    }

}