using System;

using System.Diagnostics;

using System.Text;

public class Program

{

    const long _iterations = 10000;

    public static void Main(string[] args)

    {

        //FormatTime();

        int version = 1;

        var t1 = Stopwatch.StartNew();

        while (version <= 2)

        {

            Console.WriteLine(new string('=', 128));

            t1.Restart();

            //Console.WriteLine("START VERSION {0}   : {1} elapsed", version, t1.Elapsed);  // Check for reset to 0.

            if (version == 1)

            {

                // Version 1: write 100 separate lines.

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

                {

                    //Console.WriteLine("x");

                    Console.Write(".");

                }

            }

            else if (version == 2)

            {

                // Version 2: write 100 lines as a single string.

                StringBuilder temp = new StringBuilder();

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

                {

                    //temp.AppendLine("x");

                    temp.Append(".");

                }

                Console.Write(temp.ToString());

            }

​

            // Results.

            t1.Stop();

            Console.WriteLine();

            // https://docs.microsoft.com/en-us/dotnet/api/system.diagnostics.stopwatch.elapsed?view=netframework-4.7.2

            //TimeSpan ts = t1.Elapsed;

            //string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:0000000}",

            //    ts.Hours, ts.Minutes, ts.Seconds,

            //    ts.Milliseconds * 10);

            //Console.WriteLine("RunTime " + elapsedTime);

            //Console.WriteLine("TIME FOR VERSION {0}: {1} ms", version, t1.ElapsedMilliseconds);

            //Console.WriteLine("TIME FOR VERSION {0}: {1} tk", version, t1.ElapsedTicks);

            Console.WriteLine("TIME FOR VERSION {0}: {1} elapsed", version, t1.Elapsed);

            version++;

        }

    }

    static void FormatTime()

    {

        Stopwatch stopWatch = new Stopwatch();

        stopWatch.Start();

        //Thread.Sleep(4424);

        stopWatch.Stop();

        // Get the elapsed time as a TimeSpan value.

        TimeSpan ts = stopWatch.Elapsed;

​

        // Format and display the TimeSpan value.

        string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:000000}",

            ts.Hours, ts.Minutes, ts.Seconds,

            ts.Milliseconds / 10);

        Console.WriteLine("RunTime " + elapsedTime);

    }

}