线程池

Stopwatch sw = new Stopwatch();            sw.Start();            for (int i = 0; i < 1000; i++)            {                new Thread(() => {                    int i2 = 1 + 1;                }).Start();            }            sw.Stop();            Console.WriteLine(sw.Elapsed.TotalMilliseconds);            sw.Reset();            sw.Restart();            for (int i = 0; i < 1000; i++)            {                ThreadPool.QueueUserWorkItem(new WaitCallback(PoolCallBack), "sssss" + i);            }            sw.Stop();            Console.WriteLine(sw.Elapsed.TotalMilliseconds);private static void PoolCallBack(object state)        {            int i = 1 + 1;        }