The source generation is non-incremental

[PaulusParssinen]

The source generation is completely non incremental due to rooting of compilation objects. There should not be *Syntax or symbol instances in the compilation pipeline, as they completely break the caching and increase memory usage. It's important to establish a value type data model of the things required for generating the source, see more here.

ConsoleAppFramework/src/ConsoleAppFramework/ConsoleAppGenerator.cs

Line 39 in 48d550c

}, (context, ct) => ((InvocationExpressionSyntax)context.Node, context.SemanticModel));

and

ConsoleAppFramework/src/ConsoleAppFramework/ConsoleAppGenerator.cs

Lines 63 to 66 in 48d550c

	}, (context, ct) => (
	(InvocationExpressionSyntax)context.Node,
	((context.Node as InvocationExpressionSyntax)!.Expression as MemberAccessExpressionSyntax)!.Name.Identifier.Text,
	context.SemanticModel))

Many libraries fall into this pit of failure. See similar issues in many other libraries that used IIncrementalGenerator in correctly:

• The source generator is completely non incremental zompinc/sync-method-generator#20
• ApplicationConfigurationGenerator incremantality is broken dotnet/winforms#8386
• The source generator is completely non incremental k94ll13nn3/AutoConstructor#82
• Performance of the source generator. DevTeam/Pure.DI#39
  and many many more.

Related Roslyn issues:

• Add a guarding code which prevents putting Compilation into ISG pipeline. dotnet/roslyn#71629

Here's solid article from Andrew Lock about the issues: https://andrewlock.net/creating-a-source-generator-part-9-avoiding-performance-pitfalls-in-incremental-generators/

You can see here how one library fixed their incremental generator: k94ll13nn3/AutoConstructor#83

It is also possible to add tests to test whether a pipeline is incremental:

• https://andrewlock.net/creating-a-source-generator-part-10-testing-your-incremental-generator-pipeline-outputs-are-cacheable/
• https://github.com/k94ll13nn3/AutoConstructor/blob/main/tests/AutoConstructor.Tests/IncrementalGeneratorTests.cs

[neuecc]

Thank you for the wealth of useful information!
I will attempt to make corrections based on the information you have provided!