Akka 1.4.21

Akka.NET is a port of the popular Java/Scala framework Akka to .NET

Install-Package Akka -Version 1.4.21
dotnet add package Akka --version 1.4.21
<PackageReference Include="Akka" Version="1.4.21" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Akka --version 1.4.21
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: Akka, 1.4.21"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install Akka as a Cake Addin
#addin nuget:?package=Akka&version=1.4.21

// Install Akka as a Cake Tool
#tool nuget:?package=Akka&version=1.4.21
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

Maintenance Release for Akka.NET 1.4**
Akka.NET v1.4.21 is a significant release that includes major performance improvements, bug fixes, and a major update to the [Akka.DependencyInjection NuGet package](https://getakka.net/articles/actors/dependency-injection.html).
Performance Improvements**
Akka.NET v1.4.21 includes some major performance fixes and improvements:
[`Ask` is now ~10% faster](https://github.com/akkadotnet/akka.net/pull/5051)
[`MurmurHash` is 33% faster and allocates 0 memory](https://github.com/akkadotnet/akka.net/pull/5028) - used _heavily_ in DData, Cluster Sharding, and Consistent Hash Routers
`ActorPath.Parse` went from 1672 ns/op to 527 ns/op - a 68% improvement in throughput and a 50% reduction in memory. See [#5039](https://github.com/akkadotnet/akka.net/pull/5039) and [#5068](https://github.com/akkadotnet/akka.net/pull/5068).
[Akka.Remote: remove `ActorPath.ToString` call from `ResolveActorRefWithLocalAddress`](https://github.com/akkadotnet/akka.net/pull/5034)
Important**: [Revert `ThreadPool.SetMinThreads(0,0)`](https://github.com/akkadotnet/akka.net/pull/5059) - based on the input from users on "[Akka.NET v1.4.19: ChannelExecutor performance data](https://github.com/akkadotnet/akka.net/discussions/4983)"
Our observed performance numbers for Akka.Remote show a significant increase in performance for v1.4.21 over v1.4.20:
Before*
```
PS> dotnet run -c Release --framework netcoreapp3.1
OSVersion:                         Microsoft Windows NT 6.2.9200.0
ProcessorCount:                    16
ClockSpeed:                        0 MHZ
Actor Count:                       32
Messages sent/received per client: 200000  (2e5)
Is Server GC:                      True
Thread count:                      109
Num clients, Total [msg], Msgs/sec, Total [ms]
1,  200000,    113379,    1764.56
5, 1000000,    186429,    5364.05
10, 2000000,    185340,   10791.11
15, 3000000,    183218,   16374.06
20, 4000000,    179824,   22244.63
25, 5000000,    182716,   27365.89
30, 6000000,    182039,   32960.61
```
After*
```
PS> dotnet run -c Release --framework netcoreapp3.1
OSVersion:                         Microsoft Windows NT 6.2.9200.0
ProcessorCount:                    16
ClockSpeed:                        0 MHZ
Actor Count:                       32
Messages sent/received per client: 200000  (2e5)
Is Server GC:                      True
Thread count:                      111
Num clients, Total [msg], Msgs/sec, Total [ms]
1,  200000,    109770,    1822.14
5, 1000000,    192902,    5184.79
10, 2000000,    191663,   10435.53
15, 3000000,    191339,   15679.11
20, 4000000,    192725,   20755.78
25, 5000000,    189754,   26350.14
30, 6000000,    189772,   31617.20
```
> N.B. these after numbers don't benefit from the performance benefits we observed in v1.4.20 when we invoked `ThreadPool.SetMinThreads(0,0)`, which makes them even more impressive.
Akka.DependencyInjection Updates**
We had one major issue we implemented in v1.4.21 for Akka.DependencyInjection: [Abstraction of `ServiceProvider`, Improving Akka.DependencyInjection ](https://github.com/akkadotnet/akka.net/pull/4814)
What this change did was:
Deprecate the `Akka.DependencyInjection.ServiceProvider` class in favor of the `Akka.DependencyInjection.DependencyResolver` class - to avoid namespace collision with Microsoft.Extensions.DependencyInjection.ServiceProvider;
Deprecates the `Akka.DependencyInjection.ServiceProviderSetup` class in favor of the `Akka.DependencyInjection.DependencyResolverSetup` class for consistency reasons;
`Akka.DependencyInjection.DependencyResolver` now takes an input of type [`IDependencyResolver`](https://getakka.net/api/Akka.DependencyInjection.IDependencyResolver.html), which allows users to abstract away the `IServiceProvider` and mock / replace it during unit testing; and
Added some non-generic `Props` methods for dynamically spawning actors via DI.
All of these changes are backwards-compatible with v1.4.20 and earlier - and the deprecation warnings will appear in your code when you upgrade. If you run into any [issues upgrading to Akka.DependencyInjection v1.4.21 please reply on this thread](https://github.com/akkadotnet/akka.net/discussions/5070)!
Other Changes and Fixes**
[Akka.Streams: A couple of fixes affecting the `FileSubscriber`](https://github.com/akkadotnet/akka.net/pull/5035)
[Akka.DistributedData: memory leak when recovering events from LMDB data store](https://github.com/akkadotnet/akka.net/issues/5022)
[Akka.DistributedData: port `VectorClock` performance optimizations to `VersionVector` and similar types](https://github.com/akkadotnet/akka.net/issues/4956)
To see the [full set of fixes in Akka.NET v1.4.21, please see the milestone on Github](https://github.com/akkadotnet/akka.net/milestone/51).
| COMMITS | LOC+ | LOC- | AUTHOR |
| --- | --- | --- | --- |
| 5 | 34 | 24 | Aaron Stannard |
| 4 | 196 | 77 | Gregorius Soedharmo |
| 3 | 3 | 3 | dependabot[bot] |
| 1 | 2 | 2 | Wessel Kranenborg |
| 1 | 1 | 1 | Martijn Schoemaker |

NuGet packages (155)

Showing the top 5 NuGet packages that depend on Akka:

Package Downloads
Akka.Remote
Remote actor support for Akka.NET
Akka.DI.Core
Dependency injection support for Akka.NET [DEPRECATED - replaced by Akka.DependencyInjection]
Akka.TestKit
You need a Akka.TestKit.* package! Add the one appropriate for the test framework you use instead. For example: Akka.TestKit.Xunit or Akka.TestKit.VsTest. This package only contains base functionality for writing tests for the Akka.NET framework.
Akka.Persistence
Persistence actor support for Akka.NET
Akka.Logger.Serilog
Serilog logging adapter for Akka.NET.

GitHub repositories (12)

Showing the top 5 popular GitHub repositories that depend on Akka:

Repository Stars
neo-project/neo
NEO Smart Economy
petabridge/akka-bootcamp
Self-paced training course to learn Akka.NET fundamentals from scratch
AElfProject/AElf
A scalable cloud computing blockchain platform
petabridge/NBench
Performance benchmarking and testing framework for .NET applications :chart_with_upwards_trend:
Lutando/Akkatecture
a cqrs and event sourcing framework for dotnet core using akka.net

Version History

Version Downloads Last updated
1.4.21 17,321 6/16/2021
1.4.21-beta1 1,006 6/4/2021
1.4.20 22,557 5/12/2021
1.4.19 16,786 4/28/2021
1.4.18 32,368 3/23/2021
1.4.17 22,101 3/10/2021
1.4.16 82,228 1/22/2021
1.4.15 4,808 1/20/2021
1.4.14 26,719 12/30/2020
1.4.13 11,628 12/16/2020
1.4.12 77,528 11/16/2020
1.4.11 34,003 11/5/2020
1.4.10 120,126 8/20/2020
1.4.9 50,137 7/21/2020
1.4.8 68,900 6/17/2020
1.4.7 27,894 5/27/2020
1.4.6 26,422 5/12/2020
1.4.5 34,796 4/29/2020
1.4.4 60,942 3/31/2020
1.4.3 29,804 3/18/2020
1.4.2 18,348 3/13/2020
1.4.1 99,353 3/11/2020
1.4.1-rc3 3,188 3/10/2020
1.4.1-rc2 2,562 3/10/2020
1.4.1-rc1 4,392 2/28/2020
1.4.0-beta4 4,404 1/28/2020
1.4.0-beta3 14,440 10/30/2019
1.4.0-beta2 8,029 9/23/2019
1.4.0-beta1 8,156 7/19/2019
1.3.18 22,328 3/9/2020
1.3.17 116,847 12/20/2019
1.3.16 64,091 11/14/2019
1.3.15 136,451 9/23/2019
1.3.14 115,451 7/30/2019
1.3.13 141,483 4/30/2019
1.3.12 112,491 3/14/2019
1.3.11 242,570 12/18/2018
1.3.10 108,135 11/2/2018
1.3.9 265,462 8/23/2018
1.3.8 142,686 6/5/2018
1.3.7 20,773 5/15/2018
1.3.6 31,736 4/17/2018
1.3.5 104,266 2/22/2018
1.3.4 21,842 2/1/2018
1.3.3 22,443 1/19/2018
1.3.2 111,167 10/21/2017
1.3.1 68,285 9/5/2017
1.3.0 98,858 8/11/2017
1.2.3 29,976 7/10/2017
1.2.2 12,053 6/28/2017
1.2.1 17,245 6/23/2017
1.2.0 56,432 4/12/2017
1.1.3 43,453 1/23/2017
1.1.2 59,404 9/22/2016
1.1.1 49,499 7/16/2016
1.1.0 10,946 7/7/2016
1.0.8 68,282 4/26/2016
1.0.7 12,382 4/6/2016
1.0.6 26,500 1/18/2016
1.0.5 20,168 12/3/2015
1.0.4 34,662 8/7/2015
1.0.3 10,178 6/12/2015
1.0.2 4,909 6/3/2015
1.0.1 7,435 4/28/2015
1.0.0 11,762 4/9/2015
1.0.0-dev1504032244 2,838 4/3/2015
0.8.0 4,720 2/12/2015
0.7.1 2,971 12/13/2014
0.7.0 3,271 10/20/2014
0.6.4 2,703 9/3/2014
0.6.3 2,798 8/16/2014
0.6.2 2,509 8/5/2014
0.6.1 2,625 7/10/2014
0.6.0 3,157 6/23/2014
0.5.8 2,272 5/23/2014
0.5.2 2,263 4/29/2014
0.5.0 3,721 4/16/2014
0.2.1-beta 2,067 3/22/2014
0.2.0-beta 2,669 3/19/2014