NativeAOT and DI

sample.cs

namespace InternalNamespace.Nested;

using Microsoft.Extensions.DependencyInjection;

class DependentTestService {}

class TestService
{
    public TestService(DependentTestService dependency) {}
}

class Test
{
    void Method()
    {
        var services = new ServiceCollection();
        services.AddScoped<DependentTestService>();
        services.AddScoped<TestService>();
    }
}

sourcegenerator.cs

internal static class ServicesReplacementExtensions
{
    public static object Build_global_InternalNamespace_Nested_DependentTestService(IServiceProvider serviceProvider)
    {
        return new global::InternalNamespace.Nested.TestService();
    }

    public static object Build_global_InternalNamespace_Nested_TestService(IServiceProvider serviceProvider)
    {
        var param_0 = (global::DependentTestService)serviceProvider.GetService(typeof(global::DependentTestService));
        return new global::TestService(param_0);
    }
}

namespace InternalNamespace.Nested
{
    internal static partial class global_InternalNamespace_Nested_DependentTestService_ServiceExtensions
    {
        public static IServiceCollection AddScoped<TService>(this IServiceCollection services) where TService : global::InternalNamespace.Nested.DependentTestService
        {
            return services.AddScoped(typeof(global::InternalNamespace.Nested.DependentTestService), ServicesReplacementExtensions.Build_global_InternalNamespace_Nested_DependentTestService);
        }
    }
}

namespace InternalNamespace.Nested
{
    internal static partial class global_InternalNamespace_Nested_TestService_ServiceExtensions
    {
        public static IServiceCollection AddScoped<TService>(this IServiceCollection services) where TService : global::InternalNamespace.Nested.TestService
        {
            return services.AddScoped(typeof(global::InternalNamespace.Nested.TestService), ServicesReplacementExtensions.Build_global_InternalNamespace_Nested_TestService);
        }
    }
}

stats.md

// * Summary *

BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19044.1706 (21H2)
Intel Core i7-9700F CPU 3.00GHz, 1 CPU, 8 logical and 8 physical cores
.NET SDK=7.0.100-preview.5.22267.11
  [Host]     : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT
  DefaultJob : .NET 6.0.5 (6.0.522.21309), X64 RyuJIT

Service retrieval

Method	Mean	Error	StdDev	Ratio	Gen 0	Allocated
MEDI	29.84 ns	0.139 ns	0.123 ns	2.55	0.0038	24 B
MEDI_Augmented	22.125 ns	0.0600 ns	0.0561 ns	1.93	-	-
MEDI_Aot	8.791 ns	0.0689 ns	0.0611 ns	0.77	-	-
Jab	11.445 ns	0.0456 ns	0.0404 ns	1.00	0.0038	24 B
PureDI	2.308 ns	0.0516 ns	0.0483 ns	0.20	0.0038	24 B

Container setup time

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen 0	Gen 1	Allocated
MEDI	13,654.31 ns	2,255.992 ns	6,651.842 ns	271.23	34.41	0.7610	0.1888	4,776 B
MEDI_Augmented	15,027.30 ns	2,262.808 ns	6,671.941 ns	347.57	61.52	0.7381	0.1831	6,688 B
MEDI_Aot	53.954 ns	0.4342 ns	0.4062 ns	4.01	0.06	0.0510	-	320 B
Jab	13.437 ns	0.1587 ns	0.1406 ns	1.00	0.00	0.0089	-	56 B
PureDI	1.718 ns	0.0273 ns	0.0242 ns	0.13	0.00	0.0038	-	24 B