一个Entity Framework、ADO.NET查询性能测试

Entity Framework自然是会比ADO.NET性能慢点，这个不多说了。直接上结果。

本该用测试项目的，不过我建了个aspx。下面是随便测20遍得到的结果

补充！！把12行改成 list = db.Role.AsNoTracking().ToList();
由于这只做查询，不需要上下文进行跟踪。效率瞬间提升平均3-5倍，超越SqlDataAdapter，（其实很多人用SqlDataAdapter而不是用SqlCommand）

 

 

测试代码（建aspx，nuget拿EF6.1dll，建数据库建表Role，自己插入6万条数据，有主键自增）

 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("查询6万条数据耗时测试 <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，耗时：" + (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，耗时：" + (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，耗时：" + (end - start).ToString() + " <br />");

 

EF其实是不错的东西，楼主很喜欢；很多人说EF性能差，不过我觉得EF很利于开发进度。