值類型和引用類型在hashtable里面存取的性能比較

2019-11-18 16:55:20

字體：大中小

來源：轉載

供稿：網友

首先定義兩個類:
1    public interface ITest
2    {
3        void M();
4    }
5    public class Test1:ITest
6    {
7        public void M()
8        {
9        }
10    }
11   class Test
12        {
13            public Test()
14            {
15            }
16        } 首先，測試設置的速度hashtable.add()
1static void Main(string[] args)
2        {
3            Hashtable table = new Hashtable();
4
5            System.Diagnostics.Stopwatch stopWatch = new System.Diagnostics.Stopwatch();
6            stopWatch.Start();
7            for (int i = 0; i < CompareCount; i++)
8            {
9                table.Add(i,new Test());
10            }
11            stopWatch.Stop();
12
13            for (int i = 0; i < CompareCount; i++)
14            {
15                Test o = table[i] as Test;
16            }
17
18            string t1 = stopWatch.ElapsedTicks.ToString();
19
20            Hashtable table1 = new Hashtable();
21            System.Diagnostics.Stopwatch stopWatch1 = new System.Diagnostics.Stopwatch();
22            stopWatch1.Start();
23            for (int i = 0; i < CompareCount; i++)
24            {
25                table1.Add(i, i);
26            }
27            stopWatch1.Stop();
28
29            for (int i = 0; i < CompareCount; i++)
30            {
31                int o = (int)table1[i];
32            }
33
34            string t2 = stopWatch1.ElapsedTicks.ToString();
35            Hashtable table2 = new Hashtable();
36            System.Diagnostics.Stopwatch stopWatch2 = new System.Diagnostics.Stopwatch();
37            stopWatch2.Start();
38            for (int i = 0; i < CompareCount; i++)
39            {
40                ITest test2 = new Test1();
41                table2.Add(i,test2);
42            }
43
44            stopWatch2.Stop();
45            for (int i = 0; i < CompareCount; i++)
46            {
47                ITest o = table2[i] as ITest;
48            }
49
50            string t3 = stopWatch2.ElapsedTicks.ToString();
51            Console.WriteLine(t1);
52            Console.WriteLine(t2);
53            Console.WriteLine(t3);
54            Console.WriteLine(((double)Convert.ToInt64(t1)/Convert.ToInt64(t2)).ToString());
55            Console.WriteLine(((double)Convert.ToInt64(t3) / Convert.ToInt64(t2)).ToString());
56            Console.Read();
57
58        }測試獲取的代碼
1static void Main(string[] args)
2        {
3            Hashtable table = new Hashtable();
4
5            for (int i = 0; i < CompareCount; i++)
6            {
7                table.Add(i,new Test());
8            }
9
10            System.Diagnostics.Stopwatch stopWatch = new System.Diagnostics.Stopwatch();
11            stopWatch.Start();
12            for (int i = 0; i < CompareCount; i++)
13            {
14                Test o = table[i] as Test;
15            }
16            stopWatch.Stop();
17            string t1 = stopWatch.ElapsedTicks.ToString();
18
19            Hashtable table1 = new Hashtable();
20
21            for (int i = 0; i < CompareCount; i++)
22            {
23                table1.Add(i, i);
24            }
25
26            System.Diagnostics.Stopwatch stopWatch1 = new System.Diagnostics.Stopwatch();
27            stopWatch1.Start();
28            for (int i = 0; i < CompareCount; i++)
29            {
30                int o = (int)table1[i];
31            }
32            stopWatch1.Stop();
33            string t2 = stopWatch1.ElapsedTicks.ToString();
34            Hashtable table2 = new Hashtable();
35
36            for (int i = 0; i < CompareCount; i++)
37            {
38                ITest test2 = new Test1();
39                table2.Add(i,test2);
40            }
41
42            System.Diagnostics.Stopwatch stopWatch2 = new System.Diagnostics.Stopwatch();
43            stopWatch2.Start();
44            for (int i = 0; i < CompareCount; i++)
45            {
46                ITest o = table2[i] as ITest;
47            }
48            stopWatch2.Stop();
49            string t3 = stopWatch2.ElapsedTicks.ToString();
50            Console.WriteLine(t1);
51            Console.WriteLine(t2);
52            Console.WriteLine(t3);
53            Console.WriteLine(((double)Convert.ToInt64(t1)/Convert.ToInt64(t2)).ToString());
54            Console.WriteLine(((double)Convert.ToInt64(t3) / Convert.ToInt64(t2)).ToString());
55            Console.Read();
56
57        }