precompile_utils: Don't auto-enqueue macro methods for pre-compilation

[topolarity]

Despite disabling these from being compiled in gf.c for dynamic invocations, the pre-compilation code was adding macro Methods anyway to the workqueue.

Replaces #57782

[topolarity]

@JeffBezanson What do you think about deleting the auto-nospecialize for macros in lowering?

Does it serve any purpose if we are generally not compiling this code anyways?

[nsajko]

Decreases the invalidation count on running the following code from 214 to 163 🚀

struct I <: Integer end
Base.Int(::I) = 7
Base.UInt(::I) = 0x7

Data on each invalidation:

• 0.json
• 2.json

[KristofferC]

Does these mean macro methods don't get precompiled at all? Isn't that desirable to avoid having to precompile them at every first use?

[JeffBezanson]

Yes let's try removing the inserted nospecialize as an alternative to this and see how it does. If that doesn't help, we should find a way to implement the @ name policy in a single place so we are not playing whack-a-mole. For example, if the policy we want is not to infer them, that should maybe be implemented inside inference so we can still do the rest of precompilation for them.

[vtjnash]

macros do not get used at runtime, so including them in the precompile files is (mostly) a waste of space (as is specializing them)

[JeffBezanson]

OK, it's certainly possible that no noticeable latency improvements come from precompiling macros.

[KristofferC]

macros do not get used at runtime, so including them in the precompile files is (mostly) a waste of space (as is specializing them)

They get used at runtime in scripts (notebooks etc) and by other packages during precompile time. I don't see why it doesn't make sense to compile e.g. the JuMP macros once instead of adding latency to every single script a user wants to run with it.

[nsajko]

Would it make sense to resolve the tradeoff by:

• doing the inference
• preserving the results while the Julia process is running
• not preserving the results in the precompile files?