有小伙伴问我每天忽悠的TPL是什么？

☹️ 这次站位高一点，严肃讲一讲。

using System;
using System.Threading.Tasks;
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using System.Diagnostics;

/// <summary>
/// 利用并行编程库Parallel，计算100000内素数的个数
/// </summary>
namespace Paralleler
{
    class Program
    {
        static void Main(string[] args)
        {
            Stopwatch sw = new Stopwatch();

            sw.Start();
            ShareMemory();
            sw.Stop();
            Console.WriteLine($"优化后的共享内存并发模型耗时：{sw.Elapsed}");
        }

        static void ShareMemory()
        {
            var sum = 0;
            Parallel.For(1, 100000 + 1, () => 0, (x, state, local) =>
            {
                var f = true;
                if (x == 1)
                    f = false;
                for (int i = 2; i <= x / 2; i++)
                {
                    if (x % i == 0)  // 被[2,x/2]任一数字整除，就不是质数
                        f = false;
                }
                if (f == true)
                    local++;
                return local;
            },
                 local =>
                 {
                     Interlocked.Add(ref sum, local);
                 }
               );
            Console.WriteLine($"1-100000内质数的个数是{sum}");
        }
    }
}