Leverage CommunityToolkit.MVVM Messenger

[TheCodeTraveler]

The CommunityToolkit.MVVM Messenger has been optimized to avoid any allocations and is 100x more efficient than the Microsoft.Maui.Controls.MessagingCenter (see Benchmark below).

The MVVM Community Toolkit is an open-source library in the .NET Foundation created and maintained by Microsoft Engineering in conjunction with community contributions.

More information can be found in the Microsoft Docs:
https://learn.microsoft.com/dotnet/communitytoolkit/mvvm/messenger

Recommendation: Deprecate MessagingCenter

I recommend adding the following [Obsolete] attribute:

[Obsolete("We recommend `CommunityToolkit.MVVM.WeakReferenceMessenger`: https://www.nuget.org/packages/CommunityToolkit.Mvvm" ]

Adding the [Obsolete] attribute allows for the following scenarios:

• Allows internal .NET MAUI components to continue to use Microsoft.Maui.Controls MessagingCenter
• Allows Xamarin.Forms applications migrating to .NET MAUI to continue using .NET MAUI's MessagingCenter until they move to CommunityToolkit.MVVM's messenger

Benchmark

Benchmark Source

[BurkusCat]

Is there potential in the future for Maui to directly use the toolkit's messenger?

Also, would the other frameworks you benchmarked against be interested in moving to this implementation? Are there any barriers to something like that happening? (if it is possible to have the most performant messenger with most of the features needed in other frameworks that would be amazing)

[hartez]

Is there potential in the future for Maui to directly use the toolkit's messenger?

Yep. This is what that might look like: #3880