From 9c3af43f382d1fd316a5593d77023bcc70dde0f5 Mon Sep 17 00:00:00 2001
From: BobTheBuidler <70677534+BobTheBuidler@users.noreply.github.com>
Date: Sun, 28 Sep 2025 14:01:09 -0400
Subject: [PATCH] feat: microoptimize _collections_abc._check_methods

We can reduce the number of attribute lookups requried here.

I also think we can speed it up a little bit more if we make `methods` arg a packed tuple instead of an unpacked one since we can bypass the additional tuple creation at the time of each call

Seeking input on that before I implement the same
---
 Lib/_collections_abc.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Lib/_collections_abc.py b/Lib/_collections_abc.py
index 60b471317ce97c..44d930a0dd6616 100644
--- a/Lib/_collections_abc.py
+++ b/Lib/_collections_abc.py
@@ -106,11 +106,11 @@ async def _ag(): yield
 ### ONE-TRICK PONIES ###
 
 def _check_methods(C, *methods):
-    mro = C.__mro__
+    mro_dicts = [B.__dict__ for B in C.__mro__]
     for method in methods:
-        for B in mro:
-            if method in B.__dict__:
-                if B.__dict__[method] is None:
+        for base_dict in mro_dicts:
+            if method in base_dict:
+                if base_dict[method] is None:
                     return NotImplemented
                 break
         else: