If the queue was not shared to any other process, I would guess that its
size is reliable.
However, a plain counter could be much simpler/safer.
The developer of multiprocessing.Queue, implemented
size() thinking in how to share the size and maintain a reasonable
consistency between process.
He/
The documentation says[1]
> Return the approximate size of the queue. Because of
> multithreading/multiprocessing semantics, this number is not
> reliable.
Are there any circumstances under which it *is* reliable? Most
germane, if I've added a bunch of items to the Queue, but not yet
launched an
