Pablo Galindo Salgado <pablog...@gmail.com> added the comment:
It seems 50% of the overhead (50ns) is due to two reasons: - 30-40% is due to the call to update_slot(type, name) after the item is set in the class dictionary. - 70-60% is due to all the extra work from _PyObject_GenericSetAttrWithDict until it ends calling _PyObjectDict_SetItem with the slot. If in the code of typeobject.c:type_setattro you change: res = _PyObject_GenericSetAttrWithDict((PyObject *)type, name, value, NULL); by PyObject* dictptr = _PyObject_GetDictPtr(type); res = _PyObjectDict_SetItem(type, dictptr, name, value); and delete the update_slot(type, name) call afterwards, the times are reduced to 50ns. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36012> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
