C#程序执行时间 C#程序执行时间长查询速度慢解决方案

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();
    }
  }
}