Aurélien Aptel <aurelien.aptel+emacs@gmail.com> schrieb am Fr., 10. Feb. 2017 um 19:21 Uhr:

This was not always the case: the behaviour was changed by Philipp at
some point. We still have the make_global_ref and free_global_ref
functions in the API, which serve no purpose as a result (correct me
if I'm wrong).

Using make_global_ref is definitely intended to make objects usable across environments (i.e. you should be able to use them in any thread whenever any environment is active). If that's not the case, please report a bug.

The alternative of using intern everywhere is also not too bad because it's much simpler and more obvious (no global state that you have to track carefully). I'd recommend only switching to global references if there is a significant performance penalty.