Bug report
Bug description:
queue.SimpleQueue (C level) uses a list on Python < 3.13[1][2][3][4], a ring buffer on Python >= 3.13[5][6]. However, it does not implement its own __sizeof__() method, and as a result, only the size of the simplequeueobject structure itself (basicsize) is taken as the size of the object, while the size of the underlying structure is ignored.
>>> from queue import SimpleQueue >>> q = SimpleQueue() >>> q.__sizeof__() 72 # 56 on Python < 3.13 >>> for _ in range(1_000): ... q.put(object()) ... >>> q.__sizeof__() 72 # 56 on Python < 3.13
Expected (should be, on Python >= 3.13):
>>> from queue import SimpleQueue >>> q = SimpleQueue() >>> q.__sizeof__() 136 # == 72 + 8*8 == sizeof(simplequeueobject) + sizeof(PyObject *)*INITIAL_RING_BUF_CAPACITY >>> for _ in range(1_000): ... q.put(object()) ... >>> q.__sizeof__() 8264 # == 72 + 8*1024 == sizeof(simplequeueobject) + sizeof(PyObject *)*pow(2, ceil(log2(1000)))
CPython versions tested on:
3.9, 3.10, 3.11, 3.12, 3.13, 3.14
Operating systems tested on:
Linux