C#程序执行时间长和慢查询解决： 线程并行实现处理

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

namespace TestConsoleApp
{
    /// <summary>
    ///C#慢查询解决： 线程并行实现处理
    /// </summary>
    class Program
    {
        static void Main(string[] args)
        {
            List<Task> taskList = new List<Task>();
            int count = 100;
            int batch = count % 10;
            object lockObj = new object();
            List<int> list = new List<int>();

            ///开启线程并行执行
            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();
            for (int i = 0; i < batch; i++)
            {
                taskList.Add(Task.Run(() =>
                {
                    for (int j = count * i; j < count * (i + 1); j++)
                    {
                        ///休眠等待，模拟慢查询需要消耗的时间
                        Thread.Sleep(100);
                        ///核心逻辑：避免线程插入冲突
                        lock (lockObj)
                        {
                            list.Add(i);
                        }
                    }
                }));
            }
            ///这里核心是等待所有的线程结束，然后再执行下去
            Task.WaitAll(taskList.ToArray());
            ///这里再内存处理排序，避免返回的结果跟正常查询出来的结果排序不一致
            list = list.OrderByDescending(u => u).ToList();
            Console.WriteLine(stopwatch.ElapsedMilliseconds);


            Console.WriteLine("**********分割线***********");

            ///原始遍历实现
            List<int> list2 = new List<int>();
            Stopwatch stopwatch2 = new Stopwatch();
            stopwatch2.Start();
            for (int i = 0; i < count; i++)
            {
                ///休眠等待，模拟慢查询需要消耗的时间
                Thread.Sleep(100);
                list2.Add(i);
            }
            Console.WriteLine(stopwatch2.ElapsedMilliseconds);
            Console.ReadLine();
        }
    }
}