Added opt-in locking of first detected async backend #736
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src/anyio/_core/_eventloop.py
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| if asynclib_name is None: | ||
| asynclib_name = sniffio.current_async_library() | ||
| if os.getenv("PYTEST_CURRENT_TEST"): |
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Ah...this must be a leftover from my alternate solutions. I'll see if I can improve this further.
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Actually I don't think it should be ANYIO_BACKEND either. You'll figure it out :)
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I think I got it right this time around.
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Changes
Prompted by #543, this adds an optimization, enabled by the
ANYIO_BACKENDenvironment variable, for skipping the costly sniffio automatic async backend detection after the first call. Whatever backend is detected is assumed to be running on every call since. This avoids thegetpid()system calls in this extremely often called function.Checklist
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* Fix big bad boo-boo in task groups (#123 <https://github.com/agronholm/anyio/issues/123>_; PR by Yourname)If there's no issue linked, just link to your pull request instead by updating the
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