Github Make BinaryFormatter faster · Issue #20569 · dotnet/runtime · GitHub

Alois-xx commented on Mar 11, 2017

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

namespace ConsoleApp2
{
    [Serializable]
    class Book
    {
        public string Name;
        public string Id;
    }

    class Program
    {
        static void Main(string[] args)
        {
            var formatter = new BinaryFormatter();
            List<Book> books = new List<Book>();
            var mem = new MemoryStream();
            for(int i=0;i<500*1000;i++)
            {
                books.Add(new Book { Id = i.ToString() });
            }

            var sw = Stopwatch.StartNew();
            formatter.Serialize(mem, books);
            sw.Stop();
            Console.WriteLine($"Serialization time {sw.Elapsed.TotalSeconds:F2}s");
            mem.Position = 0;
            sw = Stopwatch.StartNew();
            List<Book> booksDeser = (List<Book>)formatter.Deserialize(mem);
            sw.Stop();
            Console.WriteLine($"Deserialization {sw.Elapsed.TotalSeconds:F2}s");
        }
    }
}