pythongh-106751: Optimize SelectSelector.select() for many iteration …

…case
corona10 · Jul 19, 2023 · 8edbde4 · 8edbde4
1 parent 7513e2e
commit 8edbde4
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Showing 2 changed files with 8 additions and 8 deletions.
diff --git a/Lib/selectors.py b/Lib/selectors.py
@@ -316,15 +316,13 @@ def select(self, timeout=None):
             return ready
         r = set(r)
         w = set(w)
-        for fd in r | w:
-            events = 0
-            if fd in r:
-                events |= EVENT_READ
-            if fd in w:
-                events |= EVENT_WRITE
-
-            key = self._fd_to_key.get(fd)
+        rw = r | w
+        fd_to_key_get = self._fd_to_key.get
+        for fd in rw:
+            key = fd_to_key_get(fd)
             if key:
+                events = ((fd in r and EVENT_READ)
+                          | (fd in w and EVENT_WRITE))
                 ready.append((key, events & key.events))
         return ready
 

diff --git a/Misc/NEWS.d/next/Library/2023-07-19-10-45-24.gh-issue-106751.3HJ1of.rst b/Misc/NEWS.d/next/Library/2023-07-19-10-45-24.gh-issue-106751.3HJ1of.rst
@@ -0,0 +1,2 @@
+Optimize :meth:`SelectSelector.select` for many iteration case. Patch By
+Dong-hee Na.