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bpo-41922: Use PEP 590 vectorcall to speed up reversed() (GH-22523)

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Dong-hee Na 2020-10-04 02:16:56 +09:00 committed by GitHub
parent 3fe6148937
commit d646e91f5c
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2 changed files with 21 additions and 0 deletions
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2
Misc/NEWS.d/next/Core and Builtins/2020-10-04-01-02-58.bpo-41922.kHGT8I.rst Normal file
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@ -0,0 +1,2 @@
Speed up calls to ``reversed()`` by using the :pep:`590` ``vectorcall``
calling convention. Patch by Dong-hee Na.

19
Objects/enumobject.c
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@ -314,6 +314,24 @@ reversed_new_impl(PyTypeObject *type, PyObject *seq)
return (PyObject *)ro;
}
static PyObject *
reversed_vectorcall(PyObject *type, PyObject * const*args,
size_t nargsf, PyObject *kwnames)
{
assert(PyType_Check(type));
if (!_PyArg_NoKwnames("reversed", kwnames)) {
return NULL;
}
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (!_PyArg_CheckPositional("reversed", nargs, 1, 1)) {
return NULL;
}
return reversed_new_impl((PyTypeObject *)type, args[0]);
}
static void
reversed_dealloc(reversedobject *ro)
{
@ -445,4 +463,5 @@ PyTypeObject PyReversed_Type = {
PyType_GenericAlloc, /* tp_alloc */
reversed_new, /* tp_new */
PyObject_GC_Del, /* tp_free */
.tp_vectorcall = (vectorcallfunc)reversed_vectorcall,
};