Proposal: Compile time model generation.

[Antaris]

With the ICompileModule feature provided by the DNX, would it be possible to provide the ability to create a compile time instance of Model where the properties of the model are statically added through compile-time code generation?

E.g. using a PreCompileDatabaseModelCompileModule (ala Razor's pre-compilation compile model), that takes the target compilation, finds an non-abstract DbContext derivatives (potentially with a [PreCompile] opt-in attribute), and generate a class at runtime, something like:

    public class Model<TContext> : IModel, IModel<TContext> { }

Would it then be possible for EF to scan for instances of IModel<TContext>, create the instance and inject through DbContextOptions.UseModel(model)?

I'm just wondering that as the database model is immutable once the DB context is created, is their a benefit of offloading the model builder and verification tasks to compile time instead of runtime?

Probably no small task, and probably more for chasing absolute start-up performance and efficiencies.

[rowanmiller]

This feature is already tracked by #1906. We prototyped this early on but it has not been turned into a stable feature yet.