commit 960b9b7a2f6e9b4f0e6b692d604c53b3fd2f5d1c
author Jeffrey Yasskin <jyasskin@gmail.com> Thu Feb 28 04:45:36 2008 +0000
committer Jeffrey Yasskin <jyasskin@gmail.com> Thu Feb 28 04:45:36 2008 +0000
tree 9f0cc6bac83e4c2607c6bea64249932fc5353859
parent c105289ec4e22f5d53f3e5872ad6a49da8a33b6d

Move abc._Abstract into object by adding a new flag Py_TPFLAGS_IS_ABSTRACT,
which forbids constructing types that have it set. The effect is to speed

  ./python.exe -m timeit -s 'import abc' -s 'class Foo(object): __metaclass__ = abc.ABCMeta' 'Foo()'

up from 2.5us to 0.201us. This fixes issue 1762.

Lib/test/test_descrtut.py

diff --git a/Lib/test/test_descrtut.py b/Lib/test/test_descrtut.py
index 94e9845..514e398 100644
--- a/Lib/test/test_descrtut.py
+++ b/Lib/test/test_descrtut.py
@@ -209,6 +209,7 @@
      '__setitem__',
      '__setslice__',
      '__str__',
+     '__subclasshook__',
      'append',
      'count',
      'extend',