New submission from Itamar Ostricher <itamar...@gmail.com>:
Based on real world profiling data we collected, a vast amount of `PyType_IsSubtype` calls are coming from `type_call`, when it decides whether `__init__` should run or not. In the common case, the arguments to this call are identical, but the implementation still walks the MRO. By returning early for identical types, the common case can be optimized with a non-trivial performance gain. ---------- components: Interpreter Core messages: 405575 nosy: itamaro priority: normal severity: normal status: open title: PyType_IsSubtype is doing excessive work in the common case type: performance versions: Python 3.11 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45697> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
