Investigate JEP 502: Stable Values (Preview)

[He-Pin]

https://openjdk.org/jeps/502
Which may help for lazy val

[liach]

I think for scala3, a StableValue can replace the field holding the actual value. The translation strategy needs an update so that if a value is present, no query is made to the mutable bitmap/flags field. This is required for JIT compilers to constant fold such an initialized value.

[sjrd]

That API does seem to fit the semantics of lazy vals. However, it's currently only in Preview for Java 24/25. Judging by our last few JDK support windows, we won't be able to use this for another 5 years at the very least. I don't think this is worth tracking.