Serhiy Storchaka added the comment: I think this kills the optimization effect for non-dicts.
See on PyDict_Merge(). It takes the boolean parameter that controls the behavior in case of matching keys. I think the best would be to rename it to say _PyDict_MergeEx(), extend the boolean parameter to ternary parameter, and raise an exception if it is in the third state and matching keys are found. PyDict_Merge() would be implemented as a simple wrapper around _PyDict_MergeEx(). We should check wherever this affects the performance of dict.update(). ---------- nosy: +rhettinger _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27358> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
