使用struct与使用class初始化对象效率对比

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using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace ConsoleApp4 {     public struct A1 {         public int a { get; set; }         public int b { get; set; }         public int c { get; set; }         public int d { get; set; }         }       public class B1     {         public int a { get; set; }         public int b { get; set; }         public int c { get; set; }         public int d { get; set; }         }     class Program     {         static void Main(string[] args)         {             Stopwatch watch = new Stopwatch();             watch.Start();             for (int i = 0; i < 10000000; i++)             {                 var A = new A1();             }             watch.Stop();             Console.WriteLine(watch.ElapsedMilliseconds);             watch = new Stopwatch();             watch.Start();             for (int i = 0; i < 10000000; i++)             {                 var B = new B1();             }             watch.Stop();             Console.WriteLine(watch.ElapsedMilliseconds);             Console.Read();             }     } }

执行结果　　

 

 

1. struct在栈里面，class在堆里面。

2. struct不支持继承。

3. struct 不能有参数为空的构造函数,如果提供了构造函数，必须把所有的变量全都初始化一遍

4. 不能直接初始化变量。

5. struct是值类型，class是引用类型，这是最本质区别。

6. struct轻量级，class重量级。

7. 当涉及数组操作时，struct效率高，涉及collection操作时，class效率高