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gh-106751: Optimize _PolllikeSelector for many iteration case (gh-106884)

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Pieter Eendebak 2023-07-20 02:53:11 +02:00 committed by GitHub
parent 1e1f4e91a9
commit 832c37d42a
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 10 additions and 17 deletions
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26
Lib/selectors.py
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@ -339,11 +339,8 @@ def __init__(self):
def register(self, fileobj, events, data=None):
key = super().register(fileobj, events, data)
poller_events = 0
if events & EVENT_READ:
poller_events |= self._EVENT_READ
if events & EVENT_WRITE:
poller_events |= self._EVENT_WRITE
poller_events = ((events & EVENT_READ and self._EVENT_READ)
| (events & EVENT_WRITE and self._EVENT_WRITE) )
try:
self._selector.register(key.fd, poller_events)
except:
@ -369,11 +366,8 @@ def modify(self, fileobj, events, data=None):
changed = False
if events != key.events:
selector_events = 0
if events & EVENT_READ:
selector_events |= self._EVENT_READ
if events & EVENT_WRITE:
selector_events |= self._EVENT_WRITE
selector_events = ((events & EVENT_READ and self._EVENT_READ)
| (events & EVENT_WRITE and self._EVENT_WRITE))
try:
self._selector.modify(key.fd, selector_events)
except:
@ -404,15 +398,13 @@ def select(self, timeout=None):
fd_event_list = self._selector.poll(timeout)
except InterruptedError:
return ready
for fd, event in fd_event_list:
events = 0
if event & ~self._EVENT_READ:
events |= EVENT_WRITE
if event & ~self._EVENT_WRITE:
events |= EVENT_READ
key = self._fd_to_key.get(fd)
fd_to_key_get = self._fd_to_key.get
for fd, event in fd_event_list:
key = fd_to_key_get(fd)
if key:
events = ((event & ~self._EVENT_READ and EVENT_WRITE)
| (event & ~self._EVENT_WRITE and EVENT_READ))
ready.append((key, events & key.events))
return ready

1
Misc/NEWS.d/next/Library/2023-07-19-09-11-08.gh-issue-106751.U9nD_B.rst Normal file
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@ -0,0 +1 @@
Optimize :meth:`_PollLikeSelector.select` for many iteration case.