微型ORM的第二篇DapperLambda性能测试[Dapper比较篇]

2019-11-14 13:34:59

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由于这周比较忙，所以本来想做的性能测试，一直没时间，想想还是今天给补上吧

由于很多人都担心性能问题，封装之后跟Dapper的性能差距是多少，今天我给出我的测试方法，仅供参考.

创建IDbConnection;(DapperLambda 已经把IDbConnection封装在DbContext，所以创建的是DbContext)

 1   public class DBHelper 2     { 3         PRivate static string localStr = "server=(local);User ID=sa;PassWord=password01!;Database=LocalDB;Persist Security Info=True;Pooling=true;Max Pool Size=700"; 4         public static DbContext GetContext() 5         { 6             return new DbContext().ConnectionString(localStr); 7         } 8         public static System.Data.IDbConnection GetDapperConnection() 9         {10             return new System.Data.SqlClient.SqlConnection(localStr);11         }12     }

2.主要针对几个增删改查，几个做比较，但是用到Dapper比较简单，都是执行SQL+参数。。

1).查询语句的比较

       public static long DapperSelect()        {            Stopwatch timer = new Stopwatch();            timer.Start();            Random r = new Random();            using (var conn = DBHelper.GetDapperConnection())            {                var item = conn.Query<Models.MobileForTest>("SELECT * FROM MobileForTest mft WHERE mft.ID=@ID", new { ID = r.Next(1, 3014) });            }            timer.Stop();            return timer.ElapsedMilliseconds;        }       public static long DapperLambdaSQLSelect()        {            Stopwatch timer = new Stopwatch();            timer.Start();            Random r = new Random();            using (var context = DBHelper.GetContext())            {                var item = context.Sql("SELECT * FROM MobileForTest mft WHERE mft.ID=@ID", new { ID = r.Next(1, 3014) }).QueryMany<MobileForTest>();            }            timer.Stop();            return timer.ElapsedMilliseconds;        }        public static long DapperLambdaSelectByID()        {            Stopwatch timer = new Stopwatch();            timer.Start();            Random r = new Random();            using (var context = DBHelper.GetContext())            {                var item = context.Select<MobileForTest>(r.Next(1, 3014));            }            timer.Stop();            return timer.ElapsedMilliseconds;        }        public static long DapperLambdaSelectByLambda()        {            Stopwatch timer = new Stopwatch();            timer.Start();            Random r = new Random();            using (var context = DBHelper.GetContext())            {                var item = context.Select<MobileForTest>(p => p.ID == r.Next(1, 3014)).QueryMany();            }            timer.Stop();            return timer.ElapsedMilliseconds;        }

原本计划是起四个线程，在各自线程里调用相应的方法500次，取总耗时时间，发现线程启动的顺序，对测试的结果有明显的影响。因此改成同步的调用每个方法500次，取平均时长。测试结果如下如。

跟预期差不多是一致。

2.单条数据插入的

        public static long DapperSQLInsert()        {            Stopwatch timer = new Stopwatch();            timer.Start();            using (var conn = DBHelper.GetDapperConnection())            {                conn.Execute(@"INSERT INTO [dbo].[MobileForTest]                               ([MobileHolder]                               ,[MobilePhone]                               ,[Status])                         VALUES                               (@MobileHolder                               ,@MobilePhone                               ,@Status)", new { MobileHolder = "InsterWithTran", MobilePhone = "18922223333", Status = 0 });            }            timer.Stop();            return timer.ElapsedMilliseconds;        }        public static long DapperLambdaSQLInsert()        {            Stopwatch timer = new Stopwatch();            timer.Start();            using (var context = DBHelper.GetContext())            {                context.Sql(@"INSERT INTO [dbo].[MobileForTest]                               ([MobileHolder]                               ,[MobilePhone]                               ,[Status])                         VALUES                               (@MobileHolder                               ,@MobilePhone                               ,@Status)").Parameter("MobileHolder", "DapperLambdaSQLInsert")                                               .Parameter("MobilePhone", "18912345678")                                               .Parameter("Status", 0).Execute();            }            timer.Stop();            return timer.ElapsedMilliseconds;        }        public static long DapperLambdaInsert()        {            List<MobileForTest> ls = new List<MobileForTest>();            Stopwatch timer = new Stopwatch();            timer.Start();            using (var context = DBHelper.GetContext())            {                context.Insert<MobileForTest>(new MobileForTest { MobileHolder = "DapperLambdaInsert", MobilePhone = "18911112222", Status = 0 }).Execute();            }            timer.Stop();            return timer.ElapsedMilliseconds;        }

循环500次执行，取平均耗时。

3.更新方法测试

        public static long DapperSQLUpdate()        {            Stopwatch timer = new Stopwatch();            timer.Start();            Random r = new Random();            using (var conn = DBHelper.GetDapperConnection())            {                conn.Execute("UPDATE MobileForTest SET MobileHolder = @MobileHolder WHERE ID=@ID", new { MobileHolder = "DapperSQLUpdate", ID = r.Next(1, 10000) });            }            timer.Stop();            return timer.ElapsedMilliseconds;        }        public static long DapperLambdaSQLUpdate()        {            Stopwatch timer = new Stopwatch();            timer.Start();            Random r = new Random();            using (var context = DBHelper.GetContext())            {                context.Sql("UPDATE MobileForTest SET MobileHolder = @MobileHolder WHERE ID=@ID", new { MobileHolder = "DapperLambdaSQLUpdate", ID = r.Next(1, 10000) }).Execute();            }            timer.Stop();            return timer.ElapsedMilliseconds;        }        public static long DapperLambdaUpdate()        {            Stopwatch timer = new Stopwatch();            timer.Start();            Random r = new Random();            using (var context = DBHelper.GetContext())            {                context.Update<MobileForTest>().Set(new { MobileHolder = "DapperLambdaUpdate" }).Where(p => p.ID == r.Next(1, 10000)).Execute();            }            timer.Stop();            return timer.ElapsedMilliseconds;        }