I know, another issue about multiprocessing...

I was reading up on multiprocessing and sharing caches among those processes and it seems as if we need something like multiprocessing.SyncManager to allow accessing a cache between multiple processes.
I think it would be worthwhile to explore whether we can make AstroidManager a SyncManager that needs to be instantiated by whoever needs it rather than having it be a singleton.

However, before spending considerable time exploring this I want to see if others have had tries at this or other ideas about allowing pylint and astroid to "parse modules and nodes in multiple process while keeping a cache between those processes".

Taggin @jacobtylerwalls in particular as they have tinkered with this as well.