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bpo-37207: Use PEP 590 vectorcall to speed up frozenset() #19053

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Merged
vstinner merged 7 commits into from
Mar 18, 2020
Merged

bpo-37207: Use PEP 590 vectorcall to speed up frozenset() #19053

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d467294
bpo-37207: Use PEP 590 vectorcall to speed up frozenset()
corona10 Mar 17, 2020
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bpo-37207: Apply Victor's review
corona10 Mar 18, 2020
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bpo-37207: Use PEP 590 vectorcall to speed up frozenset()
corona10 Mar 17, 2020
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bpo-37207: git fix
corona10 Mar 18, 2020
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bpo-37207: Apply Victor's codereview
corona10 Mar 18, 2020
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corona10 Mar 18, 2020
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bpo-37207: Apply Victor's codereview
corona10 Mar 18, 2020
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bpo-37207: Use PEP 590 vectorcall to speed up frozenset()
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@corona10
corona10 committed Mar 18, 2020
commit d467294bbad29d9d6b615a7e72758ffb5c96dbe1
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2020-03-17-22-35-29.bpo-37207.sBAV1j.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Speed up calls to ``frozenset()`` by using the :pep:`590` ``vectorcall``
calling convention. Patch by Dong-hee Na.
36 changes: 36 additions & 0 deletions Objects/setobject.c
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Expand Up @@ -1095,6 +1095,41 @@ frozenset_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
return emptyfrozenset;
}

static PyObject *
frozenset_vectorcall(PyObject *type, PyObject * const*args,
size_t nargsf, PyObject *kwnames)
{
assert(PyType_Check(type));
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if (!_PyArg_NoKwnames("frozenset", kwnames)) {
return NULL;
}

Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (!_PyArg_CheckPositional("frozenset", nargs, 0, 1)) {
return NULL;
}

if (nargs) {
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if (PyFrozenSet_CheckExact(args[0])) {
Py_INCREF(args[0]);
return args[0];
}
PyObject *res = make_new_set((PyTypeObject *)type, args[0]);
if (res == NULL || PySet_GET_SIZE(res)) {
return res;
}
Py_DECREF(res);
}

// The empty frozenset is a singleton
if (emptyfrozenset == NULL) {
emptyfrozenset = make_new_set((PyTypeObject *)type, NULL);
}
Py_XINCREF(emptyfrozenset);
return emptyfrozenset;
}

static PyObject *
set_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
Expand Down Expand Up @@ -2283,6 +2318,7 @@ PyTypeObject PyFrozenSet_Type = {
PyType_GenericAlloc, /* tp_alloc */
frozenset_new, /* tp_new */
PyObject_GC_Del, /* tp_free */
.tp_vectorcall = frozenset_vectorcall,
};


Expand Down