New submission from STINNER Victor: The issue #27128 added _PyObject_FastCall() to avoid the creation of temporary tuples when calling functions.
I propose to add a new METH_FASTCALL calling convention. The example using METH_VARARGS | METH_KEYWORDS: PyObject* func(DirEntry *self, PyObject *args, PyObject *kwargs) becomes: PyObject* func(DirEntry *self, PyObject **args, int nargs, PyObject *kwargs) Using METH_VARARGS, args is a Python tuple. Using METH_FASTCALL, args is a C array of PyObject*, and there is a second nargs parameter. Later, Argument Clinic will be modified to *generate* code using the new METH_FASTCALL calling convention. Code written with Argument Clinic will only need to be updated by Argument Clinic to get the new faster calling convention (avoid the creation of a temporary tuple for positional arguments). This issue depends on the issue #27809 "_PyObject_FastCall(): add support for keyword arguments". I will wait until this dependency is implemented, before working on the implementation of this part. For a full implementation, see my first attempt in the issue #26814. I will extract the code from this branch to write a new patch. ---------- messages: 273173 nosy: haypo priority: normal severity: normal status: open title: Add METH_FASTCALL: new calling convention for C functions type: enhancement versions: Python 3.6 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27810> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
