New submission from STINNER Victor <[email protected]>:
The join() method of multiprocessing.Pool calls self._worker_handler.join():
it's a thread running _handle_workers(). The core of this thread function is:
while thread._state == RUN or (pool._cache and thread._state !=
TERMINATE):
pool._maintain_pool()
time.sleep(0.1)
I understand that the delay of 100 ms is used to check regularly the stop
condition changed. This sleep causes a mandatory delay of 100 ms on Pool.join().
----------
components: Library (Lib)
messages: 331726
nosy: vstinner
priority: normal
severity: normal
status: open
title: multiprocessing.Pool.join() always takes at least 100 ms
versions: Python 3.8
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Python tracker <[email protected]>
<https://bugs.python.org/issue35479>
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