DryIoc is fast, small, full-featured IoC Container for .NET

Designed for low-ceremony use, performance, and extensibility.
Targets: net45;netstandard2.0;netstandard2.1;net6.0;net8.0;net9.0
NuGet packages:
- DryIoc.dll
- DryIoc (source code)
- DryIoc.Internal (source code with public types made internal)
Release Notes :: Previous Versions
Extensions and Companions
Live Documentation is created with CsToMd
Contribution guide
Two original parts of the DryIoc are now the separate projects: FastExpressionCompiler and ImTools

Benchmarks

Performance overview

Realistic scenario with the unit-of-work scope and object graph of 40 dependencies 4 levels deep

More details in #44 and #26.

The listed .MsDI packages are respective Microsoft.Extensions.DependencyInjection adapters

Cold start - Registering services then opening the scope and resolving the root scoped service (e.g. controller) for the first time

DryIoc 6.0.0 (.MsDI 8.0.0), MsDI 9.0.0, Grace 7.2.1 (.MsDI 7.1.0), Autofac 8.1.1 (.MsDI 10.0.0), Lamar 14.0.1

BenchmarkDotNet v0.14.0, Windows 11 (10.0.22631.4391/23H2/2023Update/SunValley3)
Intel Core i9-8950HK CPU 2.90GHz (Coffee Lake), 1 CPU, 12 logical and 6 physical cores
.NET SDK 9.0.100
  [Host]     : .NET 9.0.0 (9.0.24.52809), X64 RyuJIT AVX2
  DefaultJob : .NET 9.0.0 (9.0.24.52809), X64 RyuJIT AVX2

| Method       |         Mean |      Error |     StdDev |       Median |  Ratio | RatioSD |     Gen0 |    Gen1 |    Gen2 | Allocated | Alloc Ratio |
| ------------ | -----------: | ---------: | ---------: | -----------: | -----: | ------: | -------: | ------: | ------: | --------: | ----------: |
| DryIoc       |     65.70 us |   1.309 us |   2.553 us |     64.46 us |   1.00 |    0.05 |   5.2490 |  0.4883 |       - |  32.74 KB |        1.00 |
| DryIoc_MsDI  |     97.96 us |   1.959 us |   4.382 us |     96.59 us |   1.49 |    0.09 |   6.5918 |  0.6104 |       - |  40.89 KB |        1.25 |
| MsDI         |     81.25 us |   1.624 us |   4.686 us |     82.73 us |   1.24 |    0.08 |  14.8926 |       - |       - |  91.15 KB |        2.78 |
| Autofac      |    323.50 us |   6.408 us |   8.555 us |    320.06 us |   4.93 |    0.23 |  49.8047 |       - |       - | 306.93 KB |        9.37 |
| Autofac_MsDI |    367.96 us |   7.324 us |  14.111 us |    362.58 us |   5.61 |    0.30 |  59.0820 |       - |       - | 364.77 KB |       11.14 |
| Lamar_MsDI   |  3,643.30 us |  56.678 us |  55.666 us |  3,630.33 us |  55.53 |    2.25 |  82.0313 |  3.9063 |       - | 524.96 KB |       16.03 |
| Grace        | 13,870.26 us | 282.593 us | 824.337 us | 13,837.66 us | 211.41 |   14.82 | 109.3750 | 93.7500 | 15.6250 | 686.94 KB |       20.98 |
| Grace_MsDI   | 17,079.41 us | 318.034 us | 326.598 us | 17,025.77 us | 260.33 |   10.92 | 125.0000 | 93.7500 |       - | 854.11 KB |       26.09 |

<details> <summary>Older versions for the comparison</summary>

DryIoc 5.0.0 (.MsDI 6.0.0), MsDI 6.0.0, Grace 7.2.1 (.MsDI 7.1.0), Autofac 6.3.0 (.MsDI 7.2.0), Lamar 8.0.1

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19043
Intel Core i9-8950HK CPU 2.90GHz (Coffee Lake), 1 CPU, 12 logical and 6 physical cores
.NET Core SDK=6.0.201
  [Host]     : .NET Core 6.0.3 (CoreCLR 6.0.322.12309, CoreFX 6.0.322.12309), X64 RyuJIT
  DefaultJob : .NET Core 6.0.3 (CoreCLR 6.0.322.12309, CoreFX 6.0.322.12309), X64 RyuJIT

| Method       |         Mean |      Error |     StdDev |  Ratio | RatioSD |    Gen 0 |   Gen 1 |  Gen 2 | Allocated |
| ------------ | -----------: | ---------: | ---------: | -----: | ------: | -------: | ------: | -----: | --------: |
| DryIoc       |     82.22 us |   1.209 us |   1.072 us |   1.00 |    0.00 |   6.3477 |  0.3662 |      - |  39.42 KB |
| DryIoc_MsDI  |     94.18 us |   1.207 us |   1.070 us |   1.15 |    0.02 |   8.0566 |  0.6104 |      - |  49.87 KB |
| MsDI         |     94.60 us |   0.715 us |   0.597 us |   1.15 |    0.01 |  11.8408 |  4.2725 |      - |  72.59 KB |
| Autofac      |    543.45 us |   4.570 us |   3.568 us |   6.60 |    0.10 |  51.7578 | 25.3906 | 1.9531 | 317.19 KB |
| Autofac_MsDI |    534.64 us |   5.919 us |   5.247 us |   6.50 |    0.10 |  54.6875 | 27.3438 | 1.9531 | 340.17 KB |
| Lamar_MsDI   |  7,053.46 us | 140.273 us | 402.469 us |  77.97 |    2.84 |        - |       - |      - | 649.68 KB |
| Grace        | 15,990.58 us | 123.798 us | 109.744 us | 194.52 |    2.21 |  93.7500 | 31.2500 |      - | 736.12 KB |
| Grace_MsDI   | 18,884.30 us | 321.388 us | 268.373 us | 229.50 |    4.25 | 125.0000 | 62.5000 |      - |  904.7 KB |

</details>

Hot run - Opening the scope and resolving the root scoped service for the Nth time