gh-74690: Don't set special protocol attributes on non-protocol subclasses of protocols #104622
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AlexWaygood requested review from Fidget-Spinner, JelleZijlstra and gvanrossum as code owners 
JelleZijlstra approved these changes May 18, 2023
carljm added a commit to carljm/cpython that referenced this pull request May 18, 2023
* main: pythongh-74690: Don't set special protocol attributes on non-protocol subclasses of protocols (python#104622) pythongh-104623: Update Windows installer to use SQLite 3.42.0 (python#104625) pythongh-104050: Add more type annotations to Argument Clinic (python#104628) pythongh-104629: Don't skip test_clinic if _testclinic is missing (python#104630) pythongh-104549: Set __module__ on TypeAliasType (python#104550) pythongh-104050: Improve some typing around `default`s and sentinel values (python#104626) pythongh-104146: Remove unused vars from Argument Clinic (python#104627) pythongh-104615: don't make unsafe swaps in apply_static_swaps (python#104620) pythonGH-104484: Add case_sensitive argument to `pathlib.PurePath.match()` (pythonGH-104565) pythonGH-96803: Document and test new unstable internal frame API functions (pythonGH-104211) pythonGH-104580: Don't cache eval breaker in interpreter (pythonGH-104581)
This was referenced May 19, 2023
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This was a small oversight in #103160. It's not a huge issue by any means, but there's no reason to set the special
__protocol_attrs__and__callable_proto_members_only__attributes for concrete subclasses of protocols, and if we skip doing so, we speedup class creation by around 33%.(Skipping news, since this fixes a small oversight in a commit that hasn't been included in any released version of Python.)