using System;

using System.IO;

​

public class Program

{

    public static void Main()

    {

        // first execution is always slower, so do it here and ignore the result

        TestWriteSpeed(100);

        // get byte-count where Write outperforms WriteByte

        for (int i = 1; i < 1_000_000; i += 1)

        {

            if (TestWriteSpeed(i))

            {

                Console.WriteLine($"Write is faster than WriteByte at {i} bytes");

                break;

            }

        }

​

        // do some more tests with fixed values

        Console.WriteLine("\n#############################################\n");

        TestWriteSpeed(1_000);

        TestWriteSpeed(2_000);

        TestWriteSpeed(4_000);

        TestWriteSpeed(8_000);

        TestWriteSpeed(16_000);

    }

​

    static bool TestWriteSpeed(int arrayLength)

    {

        Console.WriteLine($"Byte-count: {arrayLength}");

        byte[] data = GenerateRandomByteArray(arrayLength);

        var watch = System.Diagnostics.Stopwatch.StartNew();

        using (MemoryStream memoryStream = new MemoryStream())

        {

            // Measure the time it takes to write the entire byte array using Write

            watch.Restart();

            memoryStream.Write(data, 0, data.Length);

            watch.Stop();

            Console.WriteLine($"Time taken using Write: {watch.ElapsedTicks} ticks");

        }

​

        var writeDuration = watch.Elapsed;

        using (MemoryStream memoryStream = new MemoryStream())

        {

            // Measure the time it takes to write each byte using WriteByte

            watch.Restart();

            foreach (byte b in data)

            {

                memoryStream.WriteByte(b);

            }

​

            watch.Stop();

            Console.WriteLine($"Time taken using WriteByte: {watch.ElapsedTicks} ticks\n");

        }

​

        var writeByteDuration = watch.Elapsed;

        return writeDuration < writeByteDuration;

    }

​

    static byte[] GenerateRandomByteArray(int length)

    {

        // Create a random number generator

        Random random = new Random();

        // Initialize the byte array

        byte[] randomBytes = new byte[length];

        // Fill the byte array with random bytes

        random.NextBytes(randomBytes);

        return randomBytes;

    }

}