pefthymiou optimizations

AuthorDTO.cs

@@ -17,9 +17,20 @@ public class AuthorDTO
         public int Id { get; set; }
         public int RoleId { get; set; }
         public int BooksCount { get; set; }
-        public List<BookDto> AllBooks { get; set; }
+        public IEnumerable<BookDto> AllBooks { get; set; }
         public int AuthorAge { get; set; }
         public string AuthorCountry { get; set; }
         public string AuthorNickName { get; set; }
     }
+
+    public sealed class AuthorDTO_Optimized
+    {
+        public string UserFirstName { get; set; }
+        public string UserLastName { get; set; }
+        public string UserEmail { get; set; }
+        public string UserName { get; set; }
+        public int AuthorAge { get; set; }
+        public string AuthorCountry { get; set; }
+        public IEnumerable<BookDTO_Optimized> AllBooks { get; set; }
+    }
 }

BenchmarkService.cs

@@ -1,8 +1,11 @@
-using BenchmarkDotNet.Attributes;
+using System.Collections.Generic;
+using System.Linq;
+
+using BenchmarkDotNet.Attributes;
+
 using Microsoft.EntityFrameworkCore;
+
 using OptimizeMePlease.Context;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace OptimizeMePlease
 {
@@ -19,7 +22,7 @@ public BenchmarkService()
         /// and all his/her books (Book Name/Title and Publishment Year) published before 1900
         /// </summary>
         /// <returns></returns>
-        [Benchmark]
+        [Benchmark(Baseline = true)]
         public List<AuthorDTO> GetAuthors()
         {
             using var dbContext = new AppDbContext();
@@ -86,11 +89,32 @@ public List<AuthorDTO> GetAuthors()
         }
 
         [Benchmark]
-        public List<AuthorDTO> GetAuthors_Optimized()
+        public List<AuthorDTO_Optimized> GetAuthors_Optimized()
         {
-            List<AuthorDTO> authors = new List<AuthorDTO>();
+            using var dbContext = new AppDbContext();
+
+            var authors = dbContext.Authors
+                .Where(x => x.Country == "Serbia" && x.Age == 27)
+                .OrderByDescending(x => x.BooksCount)
+                .Take(2)
+                .Select(x => new AuthorDTO_Optimized
+                {
+                    UserFirstName = x.User.FirstName,
+                    UserLastName = x.User.LastName,
+                    UserName = x.User.UserName,
+                    UserEmail = x.User.Email,
+                    AuthorAge = x.Age,
+                    AuthorCountry = x.Country,
+                    AllBooks = x.Books
+                        .Where(b => b.Published.Year < 1900)
+                        .Select(y => new BookDTO_Optimized
+                        {
+                            Name = y.Name,
+                            Published = y.Published.Year
+                        })
+                });
 
-            return authors;
+            return authors.ToList();
         }
     }
 }

BookDto.cs

@@ -11,4 +11,10 @@ public class BookDto
         public string PublisherName { get; set; }
         public string ISBN { get; set; }
     }
+
+    public sealed class BookDTO_Optimized
+    {
+        public string Name { get; set; }
+        public int Published { get; set; }
+    }
 }

Context/AppDbContext.cs

@@ -1,4 +1,7 @@
-using Microsoft.EntityFrameworkCore;
+using System;
+
+using Microsoft.EntityFrameworkCore;
+
 using OptimizeMePlease.Entities;
 
 namespace OptimizeMePlease.Context
@@ -7,7 +10,7 @@ public class AppDbContext : DbContext
     {
         protected override void OnConfiguring(DbContextOptionsBuilder options)
         {
-            options.UseSqlServer("Server=localhost;Database=OptimizeMePlease;Trusted_Connection=True;Integrated Security=true;MultipleActiveResultSets=true");
+            options.UseSqlServer(@"Server=(localdb)\MSSQLLocalDB;Database=OptimizeMePlease;Trusted_Connection=True;Integrated Security=true;MultipleActiveResultSets=true");
         }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)

OptimizeMePlease.csproj

@@ -1,21 +1,21 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.13.2" />
     <PackageReference Include="Bogus" Version="34.0.2" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.29" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="3.1.29" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.29" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.29">
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.0-rc.1.22426.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="7.0.0-rc.1.22426.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.0-rc.1.22426.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.0-rc.1.22426.7">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.SqlServer.SqlManagementObjects" Version="161.47027.0" />
+    <PackageReference Include="Microsoft.SqlServer.SqlManagementObjects" Version="170.7.0-preview" />
   </ItemGroup>
 
 </Project>