一個Entity Framework、ADO.NET查詢性能測試

Entity Framework天然是會比ADO.NET性能慢點，這個很少說了。直接上結果。

本該用測試項目的，不過我建了個aspx。下面是隨便測20遍獲得的結果

補充！！把12行改爲 list = db.Role.AsNoTracking().ToList();
因爲這隻作查詢，不須要上下文進行跟蹤。效率瞬間提高平均3-5倍，超越SqlDataAdapter，（其實不少人用SqlDataAdapter而不是用SqlCommand）

 

 

測試代碼（建aspx，nuget拿EF6.1dll，建數據庫建表Role，本身插入6萬條數據，有主鍵自增）

 1         string connStr = "server=localhost;database=EF;uid=sa;pwd=your1234;Persist Security Info=True";
 2 
 3 
 4         List<Role> list = new List<Role>();
 5         DateTime start = DateTime.MinValue;
 6         DateTime end = DateTime.MinValue;
 7 
 8         Response.Write("查詢6萬條數據耗時測試 <br />");
 9         using (var db = new DBContext(connStr))
10         {
11             start = DateTime.Now;
12             list = db.Role.ToList();
13             end = DateTime.Now;
14             Response.Write("EF6.1，耗時：" + (end - start).ToString() + " <br />");
15         }
16 
17 
18         start = DateTime.Now;
19         SqlConnection conn = new SqlConnection(connStr);
20         conn.Open();
21         SqlCommand cmd = new SqlCommand("select * from [Role]", conn);
22         SqlDataReader dr = cmd.ExecuteReader();
23         while (dr.Read())
24         {
25             list.Add(new Role()
26             {
27                 ID = dr.GetInt32(0),
28                 Name = dr.GetString(1),
29                 Desc = dr.GetString(2),
30                 CreateDate = dr.GetDateTime(3),
31                 ModifyDate = dr.GetDateTime(4)
32             });
33         }
34         dr.Close();
35 
36         end = DateTime.Now;
37         Response.Write("ADO.NET SqlCommand + SqlDataReader，耗時：" + (end - start).ToString() + " <br />");
38 
39         start = DateTime.Now;
40         SqlDataAdapter sda = new SqlDataAdapter("select * from [Role]", conn);
41         var ds = new DataSet();
42         sda.Fill(ds);
43         list = (from item in ds.Tables[0].AsEnumerable()
44                select new Role
45                {
46                    ID = item.Field<int>("ID"),
47                    Name = item.Field<string>("Name"),
48                    Desc = item.Field<string>("Desc"),
49                    CreateDate = item.Field<DateTime>("CreateDate"),
50                    ModifyDate = item.Field<DateTime>("ModifyDate"),
51 
52                }).ToList();
53 
54         conn.Close();
55 
56         end = DateTime.Now;
57         Response.Write("ADO.NET SqlDataAdapter + DataSet，耗時：" + (end - start).ToString() + " <br />");

 

EF實際上是不錯的東西，樓主很喜歡；不少人說EF性能差，不過我以爲EF很利於開發進度。