很多人在保存数据时候对于使用数组、集合等？然后遍历数据的时候是for、froeach？

下面我就写一个小例子进行测试看看，话不多说，直接用数据说话。

1.构建数据分别是数组、集合构建，数据类型分别是值类型、引用类型

public static List
      
        ListData = new List
       
        ();        public static int[] ArrayData = new int[10000];        public static List
        
          ListPople = new List
         
          ();        public static people[] ArrayPeople = new people[10000]; public class people{        public string Name { get; set; }        public int Age { get;set }        public int Sex { get; set; }    }public static void InitData() {            for (int i = 0, j = 10000; i < j; i++)            {                ListData.Add(i);                ArrayData[i] = i;                ListPople.Add(new people() { Age=i, Name="N"+i, Sex=1 });                ArrayPeople[i] = new people() { Age = i, Name = "N" + i, Sex = 1 };            }        }
         
        
       
      

2.for

static void Main(string[] args)        {            System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();            Console.WriteLine("值类型for (int i = 0; i < count; i++)");            stopwatch.Start();              for (int i = 0; i < ArrayData.Length; i++)            {                Console.WriteLine(ArrayData[i]);            }            stopwatch.Stop();            Console.WriteLine("值类型使用时间："+ stopwatch.ElapsedTicks);            stopwatch.Reset();            Console.WriteLine("值类型for (int i = 0,j =count;i

1万数据

 

5万数据

3.foreach

static void Main(string[] args)        {            InitData();            System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();            Console.WriteLine("值类型 foreach");            stopwatch.Start();            foreach (int i in ListData)            {                //Console.WriteLine(i);            }            stopwatch.Stop();            Console.WriteLine("值类型使用时间：" + stopwatch.ElapsedTicks);            stopwatch.Reset();            Console.WriteLine("引用类型 foreach");            stopwatch.Start();            foreach (var i in ListPople)            {                //Console.WriteLine(i.Name);            }            stopwatch.Stop();            Console.WriteLine("使用时间：" + stopwatch.ElapsedTicks);            stopwatch.Reset();            Console.ReadLine();        }

1万数据

5万数据

4.委托货其他方式

static void Main(string[] args)        {            InitData();            System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();            Console.WriteLine("数值类型：Array.ForEach");            stopwatch.Start();            Array.ForEach
      
       (ListData.ToArray(), (value)=>{            });            stopwatch.Stop();            Console.WriteLine("值类型使用时间：" + stopwatch.ElapsedTicks);            stopwatch.Reset();            Console.WriteLine("引用类型：Array.ForEach");            stopwatch.Start();            Array.ForEach
       
        (ListPople.ToArray(), (value) => {            });            stopwatch.Stop();            Console.WriteLine("值类型使用时间：" + stopwatch.ElapsedTicks);            stopwatch.Reset();            Console.WriteLine("数值类型：Parallel.ForEach");            stopwatch.Start();            Parallel.ForEach(ListData, (value) => {});            stopwatch.Stop();            Console.WriteLine("使用时间：" + stopwatch.ElapsedTicks);            stopwatch.Reset();            Console.WriteLine("引用类型：Parallel.ForEach");            stopwatch.Start();            Parallel.ForEach(ListPople, (value) => { });            stopwatch.Stop();            Console.WriteLine("使用时间：" + stopwatch.ElapsedTicks);            stopwatch.Reset();            Console.ReadLine();        }
       
      

1万数据

5万数据

没有对比就没有伤害，所以大家在项目中遇到这类问题，还是选择合适自己的方法进行......