Version 1.5.0-beta1 contains **breaking API changes** and new API changes for Akka.NET. Breaking Changes: Logging** In [https://github.com/akkadotnet/akka.net/pull/6408](https://github.com/akkadotnet/akka.net/pull/6408) the entire `ILoggingAdapter` interface was rewritten in order to improve extensibility and performance (logging is now 30-40% faster in all cases and allocates ~50% fewer objects for large format strings). All of the changes made here are _source compatible_, but not _binary compatible_ - meaning that users and package authors will need to do the following: Add `using Akka.Event` in all files that used the `ILoggingAdapter` and Recompile. > NOTE: you can use a [`global using Akka.Event` directive](https://devblogs.microsoft.com/dotnet/welcome-to-csharp-10/#global-using-directives) to do this solution / project-wide if your project supports C# 10 and / or .NET 6. In addition to improving the performance of the `ILoggingAdapter` system, we've also made it more extensible - for instance, you can now globally configure the `ILogMessageFormatter` via the following HOCON: ``` akka { loglevel=INFO, loggers=["Akka.Logger.Serilog.SerilogLogger, Akka.Logger.Serilog"] logger-formatter="Akka.Logger.Serilog.SerilogLogMessageFormatter, Akka.Logger.Serilog" } ``` That will allow users to use the `SerilogLogMessageFormatter` globally throughout their applications - no more annoying calls like this inside individual actors that want to use semantic logging: ```csharp private readonly ILoggingAdapter _logger = Context.GetLogger<SerilogLoggingAdapter>(); ``` Breaking Changes: Akka.Persistence.Sql.Common** This is a breaking change that should effect almost no users, but [we deleted some old, bad ideas from the API surface](https://github.com/akkadotnet/akka.net/pull/6412) and it might require all Akka.Persistence.Sql* plugins to be recompiled. For what it's worth, [Akka.Persistence.Sql.Common's performance has been improved significantly](https://github.com/akkadotnet/akka.net/pull/6384) and we'll continue working on that with some additional API changes this week. Other Changes and Additions** [Akka.Actor: New API - `IActorRef.WatchAsync`](https://github.com/akkadotnet/akka.net/pull/6102) - adds a new extension method to `IActorRef` which allows users to subscribe to actor lifecycle notifications outside of the `ActorSystem`. [Akka.Actor: Suppress `System.Object` warning for serializer configuration changes](https://github.com/akkadotnet/akka.net/issues/6377) If you want to see the [full set of changes made in Akka.NET v1.5.0 so far, click here](https://github.com/akkadotnet/akka.net/milestone/7?closed=1). | COMMITS | LOC+ | LOC- | AUTHOR | | --- | --- | --- | --- | | 12 | 15 | 15 | dependabot[bot] | | 11 | 1930 | 1278 | Aaron Stannard | | 2 | 143 | 73 | Sergey Popov | | 1 | 26 | 4 | Thomas Stegemann | | 1 | 1 | 1 | Michel van Os |