多线程19-线程池批量插入线程

Posted 2020-07-28 shidengyun

    class Program
    {
        static void UseThreads(int numberOfOperations)
        {
            using (var countdown = new CountdownEvent(numberOfOperations))
            {
                Console.WriteLine("Scheduling work by creating threads");
                for (int i = 0; i < numberOfOperations; i++)
                {
                    var thread = new Thread(() =>
                    {
                        Console.WriteLine("current Thread Id={0}", Thread.CurrentThread.ManagedThreadId);
                        Thread.Sleep(TimeSpan.FromSeconds(0.1));
                        countdown.Signal();
                    });
                    thread.Start();
                }
                countdown.Wait();
                Console.WriteLine();
            }
        }
        static void UseThreadPool(int numberOfOperations)
        {
            using (var countdown = new CountdownEvent(numberOfOperations))
            {
                Console.WriteLine("Starting work on a threadPool");
                for (int i = 0; i < numberOfOperations; i++)
                {
                    ThreadPool.QueueUserWorkItem(x =>
                     {
                         Console.WriteLine("current Thread Id={0}", Thread.CurrentThread.ManagedThreadId);
                         Thread.Sleep(TimeSpan.FromSeconds(0.1));
                         countdown.Signal();
                     });
                }
                countdown.Wait();
                Console.WriteLine();
            }
        }
        static void Main()
        {
            const int numberOfOpeartions = 3000;
            var sw = new Stopwatch();
            sw.Start();
            UseThreads(numberOfOpeartions);
            sw.Stop();
            Console.WriteLine("Excution time using threads:{0}", sw.ElapsedMilliseconds);

            sw.Reset();
            sw.Start();
            UseThreadPool(numberOfOpeartions);
            sw.Stop();
            Console.WriteLine("Execution time using threads:{0}", sw.ElapsedMilliseconds);
        }
    }