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<int> ListData = new List<int>();
public static int[] ArrayData = new int[];
public static List<people> ListPople = new List<people>();
public static people[] ArrayPeople = new people[];
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 = , j = ; i < j; i++)
{
ListData.Add(i);
ArrayData[i] = i;
ListPople.Add(new people() { Age=i, Name="N"+i, Sex= });
ArrayPeople[i] = new people() { Age = i, Name = "N" + i, Sex = };
}
}
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 = ; 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<j;i++)");
stopwatch.Start();
for (int i = ,j = ArrayData.Length; i < j; i++)
{
Console.WriteLine(ArrayData[i]);
}
stopwatch.Stop();
Console.WriteLine("使用时间:" + stopwatch.ElapsedTicks);
stopwatch.Reset(); Console.WriteLine("引用类型 for (int i = 0; i < count; i++)");
stopwatch.Start();
for (int i = ; i < ArrayPeople.Length; i++)
{
Console.WriteLine(ArrayPeople[i].Name);
}
stopwatch.Stop();
Console.WriteLine("使用时间:" + stopwatch.ElapsedTicks);
stopwatch.Reset(); Console.WriteLine("值类型for (int i = 0,j =count;i<j;i++)");
stopwatch.Start();
for (int i = , j = ArrayPeople.Length; i < j; i++)
{
Console.WriteLine(ArrayPeople[i].Name);
}
stopwatch.Stop();
Console.WriteLine("使用时间:" + stopwatch.ElapsedTicks);
stopwatch.Reset(); Console.ReadLine(); }
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<int>(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<people>(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......