From: Alex Waygood <Alex.Waygood@Gmail.com>
Date: Thu, 6 Apr 2023 20:49:24 +0000 (+0100)
Subject: gh-103193: Speedup and inline `inspect._is_type` (#103321)
X-Git-Tag: v3.12.0b1~624
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=dca7d174f1dc3f9e67c7451a27bc92dc5a733008;p=thirdparty%2FPython%2Fcpython.git

gh-103193: Speedup and inline `inspect._is_type` (#103321)

Improve performance of `inspect.getattr_static`
---

diff --git a/Lib/inspect.py b/Lib/inspect.py
index a317f0ca7488..4242b40c2a08 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -1791,13 +1791,6 @@ def _check_class(klass, attr):
             return entry.__dict__[attr]
     return _sentinel
 
-def _is_type(obj):
-    try:
-        _static_getmro(obj)
-    except TypeError:
-        return False
-    return True
-
 def _shadowed_dict(klass):
     for entry in _static_getmro(klass):
         dunder_dict = _get_dunder_dict_of_class(entry)
@@ -1821,8 +1814,10 @@ def getattr_static(obj, attr, default=_sentinel):
        documentation for details.
     """
     instance_result = _sentinel
-    if not _is_type(obj):
-        klass = type(obj)
+
+    objtype = type(obj)
+    if type not in _static_getmro(objtype):
+        klass = objtype
         dict_attr = _shadowed_dict(klass)
         if (dict_attr is _sentinel or
             type(dict_attr) is types.MemberDescriptorType):