using System;

using System.Collections.Generic;

using System.IO;

using System.IO.Compression;

using System.Linq;

using System.Text;

using System.Threading.Channels;

using System.Threading.Tasks;

using System.Diagnostics;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Running ZipWhileStreaming.");

        ZipWhileStreaming();

        Console.WriteLine();

        Console.WriteLine("Running StreamAndThenZip.");

        StreamAndThenZip();

        Console.WriteLine();

        Console.WriteLine("Running StreamNoZip.");

        StreamNoZip();

    }

    public static void ZipWhileStreaming()

    {

        Stopwatch sw = Stopwatch.StartNew();

        using var stream = new MemoryStream();

        using (var zip = new ZipArchive(stream, ZipArchiveMode.Create, true))

        {

            var entry = zip.CreateEntry($"passarelli.txt");

            using (var streamWriter = new StreamWriter(entry.Open()))

            {

​

                for(int i = 0; i < 1000000; i++)

                {

                    streamWriter.WriteLine("Passarelli");

                }

​

                streamWriter.Flush();

            }

        }

        sw.Stop();

        Console.WriteLine($"Stream length: {stream.Length} bytes");

        Console.WriteLine($"Total time: {sw.ElapsedMilliseconds} milliseconds");

    }

    public static void StreamAndThenZip()

    {

        Stopwatch sw = Stopwatch.StartNew();

        StringBuilder sb = new StringBuilder();

        for(int i = 0; i < 1000000; i++)

        {

            sb.AppendLine("Passarelli");

        }

        using var stream = new MemoryStream();

        using (var zip = new ZipArchive(stream, ZipArchiveMode.Create, true))

        {

            var entry = zip.CreateEntry($"passarelli.txt");

            using (var streamWriter = new StreamWriter(entry.Open()))

            {

​

                streamWriter.Write(sb);

​

                streamWriter.Flush();

            }

        }

        sw.Stop();

        Console.WriteLine($"Stream length: {stream.Length} bytes");

        Console.WriteLine($"Total time: {sw.ElapsedMilliseconds} milliseconds");

    }

    public static void StreamNoZip()

    {

        Stopwatch sw = Stopwatch.StartNew();

        using var stream = new MemoryStream();

        using (var streamWriter = new StreamWriter(stream))

        {

​

            for(int i = 0; i < 1000000; i++)

            {

                streamWriter.WriteLine("Passarelli");

            }

​

            streamWriter.Flush();

            sw.Stop();

            Console.WriteLine($"Stream length: {stream.Length} bytes");

            Console.WriteLine($"Total time: {sw.ElapsedMilliseconds} milliseconds");

        }

​

    }

}