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gh-91603: Speed up isinstance/issubclass on union types (GH-91631)

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Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
This commit is contained in:
Yurii Karabas 2022-04-28 18:24:19 +03:00 • committed by GitHub
parent 4ed3900041
commit 0ef8d921f5
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7 changed files with 24 additions and 79 deletions
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8
Objects/abstract.c
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@ -2625,6 +2625,10 @@ object_recursive_isinstance(PyThreadState *tstate, PyObject *inst, PyObject *cls
return object_isinstance(inst, cls);
}
if (_PyUnion_Check(cls)) {
cls = _Py_union_args(cls);
}
if (PyTuple_Check(cls)) {
/* Not a general sequence -- that opens up the road to
recursion and stack overflow. */
@ -2714,6 +2718,10 @@ object_issubclass(PyThreadState *tstate, PyObject *derived, PyObject *cls)
return recursive_issubclass(derived, cls);
}
if (_PyUnion_Check(cls)) {
cls = _Py_union_args(cls);
}
if (PyTuple_Check(cls)) {
if (_Py_EnterRecursiveCall(tstate, " in __subclasscheck__")) {