[Python-checkins] bpo-37207: Use vectorcall for list() (GH-18928)
Petr Viktorin
webhook-mailer at python.org
Mon Mar 30 08:16:26 EDT 2020
https://github.com/python/cpython/commit/ce105541f8ebcf2dffcadedfdeffdb698a0edb44
commit: ce105541f8ebcf2dffcadedfdeffdb698a0edb44
branch: master
author: Petr Viktorin <encukou at gmail.com>
committer: GitHub <noreply at github.com>
date: 2020-03-30T14:16:16+02:00
summary:
bpo-37207: Use vectorcall for list() (GH-18928)
Speed up calls to list() by using the PEP 590 vectorcall
calling convention. Patch by Mark Shannon.
Co-authored-by: Mark Shannon <mark at hotpy.org>
Co-authored-by: Dong-hee Na <donghee.na92 at gmail.com>
files:
A Misc/NEWS.d/next/Core and Builtins/2019-06-09-10-54-31.bpo-37207.bLjgLS.rst
M Objects/listobject.c
diff --git a/Misc/NEWS.d/next/Core and Builtins/2019-06-09-10-54-31.bpo-37207.bLjgLS.rst b/Misc/NEWS.d/next/Core and Builtins/2019-06-09-10-54-31.bpo-37207.bLjgLS.rst
new file mode 100644
index 0000000000000..b6d0236db4635
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2019-06-09-10-54-31.bpo-37207.bLjgLS.rst
@@ -0,0 +1,2 @@
+Speed up calls to ``list()`` by using the :pep:`590` ``vectorcall``
+calling convention. Patch by Mark Shannon.
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 4e2b6a9c1609a..91687bcd22910 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -2719,6 +2719,33 @@ list___init___impl(PyListObject *self, PyObject *iterable)
return 0;
}
+static PyObject *
+list_vectorcall(PyObject *type, PyObject * const*args,
+ size_t nargsf, PyObject *kwnames)
+{
+ if (!_PyArg_NoKwnames("list", kwnames)) {
+ return NULL;
+ }
+ Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
+ if (!_PyArg_CheckPositional("list", nargs, 0, 1)) {
+ return NULL;
+ }
+
+ assert(PyType_Check(type));
+ PyObject *list = PyType_GenericAlloc((PyTypeObject *)type, 0);
+ if (list == NULL) {
+ return NULL;
+ }
+ if (nargs) {
+ if (list___init___impl((PyListObject *)list, args[0])) {
+ Py_DECREF(list);
+ return NULL;
+ }
+ }
+ return list;
+}
+
+
/*[clinic input]
list.__sizeof__
@@ -3034,6 +3061,7 @@ PyTypeObject PyList_Type = {
PyType_GenericAlloc, /* tp_alloc */
PyType_GenericNew, /* tp_new */
PyObject_GC_Del, /* tp_free */
+ .tp_vectorcall = list_vectorcall,
};
/*********************** List Iterator **************************/
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