EF扩展

//安装 Z.EntityFramework.Extensions.EFCore

using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Data.SqlClient;
using System.Diagnostics;

public class Program
{
	public static List<BenchmarkResult> BenchmarkResults = new List<BenchmarkResult>();
	
	public static void Main()
	{
		using (var context = new EntityContext())
		{
			context.Database.EnsureCreated();
		}
		
		JustInTime_Compile();
		
		JustInTime_Compile();
		
		// Generate X entities
		var customers = GenerateCustomers(1000);
		var inactiveCustomers = customers.Where(x => !x.IsActive).ToList();
		
		var clockInsert = new Stopwatch();
		var clockUpdate = new Stopwatch();
		var clockDelete = new Stopwatch();
		
		using (var context = new EntityContext())
		{
			// BulkInsert
			{
				clockInsert.Start();
				context.BulkInsert(customers);
				clockInsert.Stop();
				
				BenchmarkResults.Add(new BenchmarkResult() { Action = "BulkInsert", Entities = customers.Count, Performance = clockInsert.ElapsedMilliseconds + " ms" });
			}
			
			// BulkUpdate
			{
				inactiveCustomers.ForEach(x => x.Name = "zzz;" + x.Name);
				clockUpdate.Start();
				context.BulkUpdate(inactiveCustomers);
				clockUpdate.Stop();
				
				BenchmarkResults.Add(new BenchmarkResult() { Action = "BulkUpdate", Entities = inactiveCustomers.Count, Performance = clockUpdate.ElapsedMilliseconds + " ms" });
			}
			
			// BulkDelete
			{
				clockDelete.Start();
				context.BulkDelete(inactiveCustomers);
				clockDelete.Stop();
				
				BenchmarkResults.Add(new BenchmarkResult() { Action = "BulkDelete", Entities = inactiveCustomers.Count, Performance = clockDelete.ElapsedMilliseconds + " ms" });
			}
		}
		
		FiddleHelper.WriteTable("EFE - Easy to use, easy to customize!", BenchmarkResults);
	}
		 
	public static void JustInTime_Compile()
	{
		var customers = GenerateCustomers(10);
		
		using (var context = new EntityContext())
		{
			context.BulkInsert(customers);
			context.BulkDelete(customers);
		}
	}
	
	public static List<Customer> GenerateCustomers(int count)
	{
		var list = new List<Customer>();
		
		for(int i = 0; i < count; i++)
		{
			list.Add(new Customer() { Name = "Customer_" + i, Description = "Description_" +  i, IsActive = i % 2 == 0 });
		}

		return list;
	}

	public class EntityContext : DbContext
	{
		public EntityContext() 
		{
		}

		protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
		{
			optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));

			base.OnConfiguring(optionsBuilder);
		}
		
		public DbSet<Customer> Customers { get; set; }
	}

	public class Customer
	{
		public int CustomerID { get; set; }
		public string Name { get; set; }
		public string Description { get; set; }
		public Boolean IsActive { get; set; }
	}
	
	public class BenchmarkResult
	{
		public string Action { get; set; }
		public int Entities { get; set; }
		public string Performance { get; set; }
	}
}