10000 gh-111926: Avoid locking in PyType_IsSubtype by mpage · Pull Request #117275 · python/cpython · GitHub
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gh-111926: Avoid locking in PyType_IsSubtype #117275

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Merged
merged 5 commits into from
Mar 29, 2024
Merged

gh-111926: Avoid locking in PyType_IsSubtype #117275

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ed1e37f
Use QSBR to avoid locking in PyType_IsSubtype
mpage Mar 26, 2024
ce38dbf
Make sure GC actually delays freeing
mpage Mar 27, 2024
21b40de
Refactor PyType_IsSubtype and _PyType_GetMRO
mpage Mar 27, 2024
0ee1aa3
Done add tuples tagged for delayed reclamation to free lists
mpage Mar 28, 2024
e5c7b59
Temporarily remove thread safety when performing PyType_IsSubtype
mpage Mar 28, 2024
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9 changes: 1 addition & 8 deletions Objects/typeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2341,14 +2341,7 @@ is_subtype_with_mro(PyObject *a_mro, PyTypeObject *a, PyTypeObject *b)
int
PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b)
{
#ifdef Py_GIL_DISABLED
PyObject *mro = _PyType_GetMRO(a);
int res = is_subtype_with_mro(mro, a, b);
Py_XDECREF(mro);
return res;
#else
return is_subtype_with_mro(lookup_tp_mro(a), a, b);
#endif
return is_subtype_with_mro(a->tp_mro, a, b);
}

/* Routines to do a method lookup in the type without looking in the
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