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gh-106751: Optimize KqueueSelector.select() for many iteration case (gh-106864)

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Dong-hee Na 2023-07-19 10:18:23 +09:00 committed by GitHub
parent 663854d73b
commit 7513e2e7e4
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2 changed files with 8 additions and 8 deletions
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14
Lib/selectors.py
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@ -547,23 +547,21 @@ def select(self, timeout=None):
# If max_ev is 0, kqueue will ignore the timeout. For consistent
# behavior with the other selector classes, we prevent that here
# (using max). See https://bugs.python.org/issue29255
max_ev = max(len(self._fd_to_key), 1)
max_ev = len(self._fd_to_key) or 1
ready = []
try:
kev_list = self._selector.control(None, max_ev, timeout)
except InterruptedError:
return ready
fd_to_key_get = self._fd_to_key.get
for kev in kev_list:
fd = kev.ident
flag = kev.filter
events = 0
if flag == select.KQ_FILTER_READ:
events |= EVENT_READ
if flag == select.KQ_FILTER_WRITE:
events |= EVENT_WRITE
key = self._fd_to_key.get(fd)
key = fd_to_key_get(fd)
if key:
events = ((flag == select.KQ_FILTER_READ and EVENT_READ)
| (flag == select.KQ_FILTER_WRITE and EVENT_WRITE))
ready.append((key, events & key.events))
return ready

2
Misc/NEWS.d/next/Library/2023-07-18-23-05-12.gh-issue-106751.tVvzN_.rst Normal file
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@ -0,0 +1,2 @@
Optimize :meth:`KqueueSelector.select` for many iteration case. Patch By
Dong-hee Na.