What about some of the data is deleted or modified directly add good is better

Today whim, wondering if a change data, delete adopt or modify faster and faster

I am using EF, did not do any package, pure simple introduction

The first time I used to do a million data tests

 

 The result is obvious, optical data deleted 39 seconds. Let alone add up ten thousand data

The second time I used the 5000 data for testing

But let me puzzled, actually spent more than a penny to delete

 

The third test to do with one thousand data

 

 Modify hardly any time with

Suddenly felt, maybe when you make changes for certain data, or direct modification of the method is relatively better

This time it is not physically deleted played a very good role

This field only once together, we must be careful carefully before the best package directly to the bottom, or else, an oversight, it may be a surprise.

And fortunately for uniqueness do verification, if there is a data exactly the same, whether it is to change the status or add a new data

Ef I did not do any processing, the following is my code

 

 

 1  MyEntities myTest = new MyEntities();
 2             Console.WriteLine("1000");
 3             var remeData = myTest.TestTable1.Where(c => c.Id <= 27000).ToList();
 4             var aTime = DateTime.Now;
 5             myTest.TestTable1.RemoveRange(remeData);
 6             myTest.SaveChanges();
 7             var bTime = DateTime.Now;
 8             var remeTime = bTime - aTime;
 9             Console.WriteLine($"Remove: 原始时间：{aTime},结束时间：{bTime}，用时：{remeTime}");
10             var modifyData = myTest.TestTable1.Where(c => c.Id > 27000 && c.Id <= 28000).ToList();
11             var cTime = DateTime.Now;
12             foreach (var item in modifyData)
13             {
14                 item.Name = "123";
15                 item.Content = "FDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjgFDSFSDGFDFHGFDHFGHJGFHJGHJfhdfgdgsklgjasl;fkjdalghjdlskjgndklfgjds;flkgjsdkflgjdskfjgkdslfjg";
16             }
17             myTest.SaveChanges();
18             var dTime = DateTime.Now;
19             var modifyTime = dTime - cTime;
20             Console.WriteLine($"Modify: 原始时间：{cTime},结束时间：{dTime}，用时：{modifyTime}");
21             Console.WriteLine("完成");
22             Console.ReadLine();

 1         public MyEntities() : base("EFDbContext")
 2         {
 3             Database.SetInitializer<MyEntities>(null);
 4         }
 5         public DbSet<TestTable1> TestTable1 { get; set; }
 6         protected override void OnModelCreating(DbModelBuilder modelBuilder)
 7         {
 8             modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
 9             base.OnModelCreating(modelBuilder);
10         }
11     }
12 
13     public class TestTable1
14     {
15         public int Id { get; set; }
16         public string Name { get; set; }
17         public string Content { get; set; }
18     }

也有可能是我没有任何封装的缘故吧

为此我决定开始好好专研以下ef

学习的路是漫长的

代码的路也是漫长的

共勉