C#复制数组的两种方式及效率比较_C#教程

class Program
{
    static void Main(string[] args)
    {
        int[] a = {1, 3, 6};
        int[] b =new int[a.Length];
        Array.Copy(a,0,b,0,a.Length);
        
        MyArrCopy myArrCopy = new MyArrCopy();
        myArrCopy.Display(a);
        Console.ReadKey();
    }
}
        
public class MyArrCopy
{
    public void Display(int[] arr)
    {
        for (int i = 0; i < arr.Length; i++)
        {
            if (i != 0)
            {
                Console.Write(",");
            }
            Console.Write(arr[i]);
        }
    }
}

public class CopyTest
{
    private int[] _myArr;//数组源
    private int[] _blockArr=new int[10000];//使用 Buffer.BlockCopy的目标数组
    private int[] _copyArr=new int[10000];//使用Array.Copy的目标数组
    
    public CopyTest(int[] myArr)
    {
        _myArr = myArr;
    }
    
    public void TestBlockCopy()
    {
        Stopwatch sw = new Stopwatch();
        sw.Start();
        Buffer.BlockCopy(_myArr, 0,_blockArr,0,_myArr.Length);
        sw.Stop();
        Console.WriteLine("使用Buffer.BlockCopy方法：" + sw.ElapsedTicks);
    }
    
    public void TestNormalCopy()
    {
        Stopwatch sw = new Stopwatch();
        sw.Start();
        Array.Copy(_myArr, 0, _copyArr,0, _myArr.Length);
        sw.Start();
        Console.WriteLine("使用Array.Copy方法：" + sw.ElapsedTicks);
    }
}

int[] a = new int[10000];
for (int i = 0; i < 10000; i++)
{
    a[i] = i;
}

var copyTest = new CopyTest(a);
copyTest.TestBlockCopy();
copyTest.TestNormalCopy();

Console.ReadKey();