Would it make sense to support WeakMaps?

[LifeIsStrange]

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Keyed_collections#weakmap_object See also the analogue WeakSet.

(I've seen that you already implemented support for WeakReferences btw)

[Bnaya]

You mean you would want to save WeakMaps/Sets to the objectbuffer? I'm not sure if it's possible. WeakReferences as in use internally as part of the memory reclaiming, but you can't save them into an objectbuffer.

Unless I'm missing something :) I would love to hear more about your usecase