性能

FreeSql 实现了强大功能的同时，性能没有受到影响，项目中使用反射或耗时的操作都经过了缓存处理。读取数据部分采用了 ExpressionTree，使得 FreeSql 解析实体数据的速度与 Dapper 非常接近。

插入测试

测试结果(52 个字段)

	18W	1W	5K	2K	1K	500	100	50
MySql 5.5 ExecuteAffrows	38,481	2,234	1,136	284	239	167	66	30
MySql 5.5 ExecuteMySqlBulkCopy	28,405	1,142	657	451	435	592	47	22
SqlServer Express ExecuteAffrows	402,355	24,847	11,465	4,971	2,437	915	138	88
SqlServer Express ExecuteSqlBulkCopy	21,065	578	326	139	105	79	60	48
PostgreSQL 10 ExecuteAffrows	46,756	3,294	2,269	1,019	374	209	51	37
PostgreSQL 10 ExecutePgCopy	10,090	583	337	136	88	61	30	25
Oracle XE ExecuteAffrows	-	-	-	-	24,528	10,648	571	200
Sqlite ExecuteAffrows	28,554	1,149	701	327	155	91	44	35

18W 解释：插入 18 万行记录，表格中的数字是执行时间（单位 ms）

Oracle 插入性能不用怀疑，可能安装学生版限制较大

提醒：开源数据库测试结果比较有意义，商业数据库版本之间性能可能有较大差距

测试结果(10 个字段)

	18W	1W	5K	2K	1K	500	100	50
MySql 5.5 ExecuteAffrows	11,171	866	366	80	83	50	24	34
MySql 5.5 ExecuteMySqlBulkCopy	6,504	399	257	116	87	100	16	16
SqlServer Express ExecuteAffrows	47,204	2,275	1,108	488	279	123	35	16
SqlServer Express ExecuteSqlBulkCopy	4,248	127	71	30	48	14	11	10
PostgreSQL 10 ExecuteAffrows	9,786	568	336	157	102	34	9	6
PostgreSQL 10 ExecutePgCopy	4,081	167	93	39	21	12	4	2
Oracle XE ExecuteAffrows	-	-	-	-	2,394	731	67	33
Sqlite ExecuteAffrows	4,524	246	137	94	35	19	14	11

测试结果，是在相同操作系统下进行的，并且都有预热

ExecuteMySqlBulkCopy 方法在 FreeSql.Provider.MySqlConnector 中实现的

//测试实体类
public class TestInsert10c {
    [Column(MapType = typeof(string))]
    public Guid Id { get; set; }

    public string UserName0 { get; set; }
    public string PassWord0 { get; set; }
    public DateTime CreateTime0 { get; set; }

    public string UserName1 { get; set; }
    public string PassWord1 { get; set; }
    public DateTime CreateTime1 { get; set; }

    public string UserName2 { get; set; }
    public string PassWord2 { get; set; }
    public DateTime CreateTime2 { get; set; }
}

//生成测试数据
IFreeSql orm = ...;
var testCount = 10000;
var t10cs = new List<TestInsert10c>();
for (var a = 0; a < testCount; a++) {
    var item = new TestInsert10c();
    for (var b = 0; b <= 2; b++)
    {
        orm.SetEntityValueWithPropertyName(typeof(TestInsert10c), item, "UserName" + b, Guid.NewGuid().ToString("N"));
        orm.SetEntityValueWithPropertyName(typeof(TestInsert10c), item, "PassWord" + b, Guid.NewGuid().ToString("N"));
        orm.SetEntityValueWithPropertyName(typeof(TestInsert10c), item, "CreateTime" + b, DateTime.Now);
    }
    t10cs.Add(item);
}

查询测试

IFreeSql mysql = new FreeSql.FreeSqlBuilder()
    .UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=100")
    //由于null会默认输出日志到控制台，影响测试结果。这里传入一个空的日志输出对象
    .UseAutoSyncStructure(false)
    //关闭自动迁移功能
    .Build(); //请务必定义成 Singleton 单例模式

class Song {
    public int Id { get; set; }
    public string Title { get; set; }
    public string Url { get; set; }
    public DateTime Create_time { get; set; }
    public bool Is_deleted { get; set; }
}

测试方法：运行两次，以第二次性能报告，避免了首个运行慢不公平的情况。

测试结果

	数量	Query<Class>	Query<Tuple>	Query<dynamic>
Dapper.Query(sql)	131072	623.4959ms	424.2411ms	644.8897ms
FreeSql.Query(sql)	131072	647.0552ms	577.3532ms	944.7454ms
FreeSql.ToList	131072	622.8980ms	435.3532ms	-

FreeSql 以微小的性能差距输了，原因是支持了更多的类型，某些类型解析需要 Parse、递归或循环处理。

由于 Dapper 没有批量插入/更新/删除的功能，并且都是执行一条 SQL 命令，测试结果没有意义。

FreeSql 批量插入使用的命令：INSERT INTO Song (...) VALUES(...),VALUES(...),VALUES(...)...

执行 SQL 返回实体列表 Dapper.Query<Class> VS FreeSql.Query<Class>

[Fact]
public void QueryEntity() {
    var sb = new StringBuilder();
    var time = new Stopwatch();

    time.Restart();
    List<Song> dplist1 = null;
    using (var conn = g.mysql.Ado.MasterPool.Get()) {
        dplist1 = Dapper.SqlMapper.Query<Song>(conn.Value, "select * from song").ToList();
    }
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; Query Entity Counts: {dplist1.Count}; ORM: Dapper");

    time.Restart();
    var t3 = g.mysql.Ado.Query<Song>("select * from song");
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; Query Entity Counts: {t3.Count}; ORM: FreeSql*");
}

执行 SQL 返回元组列表 Dapper.Query<Tuple> VS FreeSql.Query<Tuple>

[Fact]
public void QueryTuple() {
    var sb = new StringBuilder();
    var time = new Stopwatch();

    time.Restart();
    List<(int, string, string)> dplist2 = null;
    using (var conn = g.mysql.Ado.MasterPool.Get()) {
        dplist2 = Dapper.SqlMapper.Query<(int, string, string)>(conn.Value, "select * from song").ToList();
    }
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; Query Tuple Counts: {dplist2.Count}; ORM: Dapper");

    time.Restart();
    var t4 = g.mysql.Ado.Query<(int, string, string)>("select * from song");
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; Query Tuple Counts: {t4.Count}; ORM: FreeSql*");
}

执行 SQL 返回 dynamic 列表 Dapper.Query<dynamic> VS FreeSql.Query<dynamic>

[Fact]
public void QueryDynamic() {
    var sb = new StringBuilder();
    var time = new Stopwatch();

    time.Restart();
    List<dynamic> dplist3 = null;
    using (var conn = g.mysql.Ado.MasterPool.Get()) {
        dplist3 = Dapper.SqlMapper.Query<dynamic>(conn.Value, "select * from song").ToList();
    }
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; Query Dynamic Counts: {dplist3.Count}; ORM: Dapper");

    time.Restart();
    var t5 = g.mysql.Ado.Query<dynamic>("select * from song");
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; Query Dynamic Counts: {t3.Count}; ORM: FreeSql*");
}

Dapper.Query VS FreeSql.ToList

[Fact]
public void QueryList() {
    var sb = new StringBuilder();
    var time = new Stopwatch();

    time.Restart();
    var t3 = g.mysql.Select<Song>().ToList();
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; ToList Entity Counts: {t3.Count}; ORM: FreeSql*");

    time.Restart();
    List<Song> dplist1 = null;
    using (var conn = g.mysql.Ado.MasterPool.Get()) {
        dplist1 = Dapper.SqlMapper.Query<Song>(conn.Value, "select * from song").ToList();
    }
    time.Stop();
    sb.AppendLine($"Elapsed: {time.Elapsed}; Query Entity Counts: {dplist1.Count}; ORM: Dapper");
}

更多测试源码：FreeSql/FreeSql.Tests.PerformanceTests/MySqlAdoTest.cs