using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
List<A> list1 = Init(true);
List<A> list2 = Init(false);
var sw = Stopwatch.StartNew();
Dictionary<int, A> dic1 = list1.ToDictionary(m => m.id, m => m);
Dictionary<int, A> dic2 = list2.ToDictionary(m => m.id, m => m);
ConcurrentBag<A> results = new ConcurrentBag<A>();
Parallel.ForEach(dic1,
new ParallelOptions { MaxDegreeOfParallelism = 4 },
item =>
{
results.Add(new A { id = item.Key, name = item.Value.name, level = dic2[item.Key].level });
});
sw.Stop();
Console.WriteLine("用時：{0}毫秒", sw.ElapsedMilliseconds.ToString());
List<A> list3 = results.OrderBy(m => m.id).ToList();
for (int i = 0; i < 10; i++)
{
Console.WriteLine($"id:{list3[i].id} name:{list3[i].name} level:{list3[i].level}");
}
Console.ReadKey();
}
private static List<A> Init(bool isFirstList)
{
List<A> list = new List<A>();
for (int i = 0; i < 1000000; i++)
{
if (isFirstList)
list.Add(new A { id = i, name = $"name_{i.ToString()}" });
else
list.Add(new A { id = i, level = $"level_{i.ToString()}" });
}
return list;
}
public class A
{
public int id { get; set; }
public string name { get; set; }
public string level { get; set; }
}
}
}
不到壹秒，希望采納。。。。