.NetCore 下 Mapper 测试传统映射 vs EmitMapper vs AutoMapper - .NET | Minskiter's Blog = Blog of Minskiter = Share blogs

	using System;
	using AutoMapper;
	using System.Diagnostics;
	using EmitMapper;

	namespace test
	{
	class Program
	{
	static void Main(string[] args)
	{
	var student = new Student
	{
	Name= "test",
	No = "1234567896766666666666666666666666666666666666666666",
	};
	var watch = new Stopwatch();
	int count = 10000000;


	Console.WriteLine();
	Console.WriteLine("Automapper 映射测试");
	MapperConfiguration configuration = new MapperConfiguration(
	cfg =>
	{
	cfg.CreateMap<Student, StudentDto>();
	});
	var mapper = configuration.CreateMapper();
	watch.Start();
	for (int i = 0; i < count; ++i)
	{
	var studentdto = mapper.Map<Student, StudentDto>(student);
	}
	watch.Stop();
	Console.WriteLine($"时间消耗：{watch.ElapsedMilliseconds}ms");

	Console.WriteLine();
	Console.WriteLine("EmitMapper 映射测试");
	ObjectsMapper<Student, StudentDto> emitMap = ObjectMapperManager.DefaultInstance.GetMapper<Student, StudentDto>();
	watch.Restart();
	for (int i = 0; i < count; ++i)
	{
	StudentDto studentdt = emitMap.Map(student);
	}
	watch.Stop();
	Console.WriteLine($"时间消耗：{watch.ElapsedMilliseconds}ms");

	Console.WriteLine("\n传统方法普通映射");
	watch.Restart();
	for (int i = 0; i < count; ++i)
	{
	var studentDto = new StudentDto
	{
	Name = student.Name,
	No = student.No,
	};
	}
	watch.Stop();
	Console.WriteLine($"时间消耗：{watch.ElapsedMilliseconds}ms");
	}
	}

	public class StudentDto
	{
	public string Name{ get; set; }
	public string No { get; set; }
	}

	public class Student
	{
	public string Name{ get; set; }
	public string No { get; set; }
	}
	}

速度对比：
AutoMapper ~ 10 倍传统映射
EmitMapper ~ 1.5 倍传统映射