From 516b98161a0e88fde85145ead571e13394215f8c Mon Sep 17 00:00:00 2001 From: Victor Stinner Date: Thu, 9 Feb 2017 22:53:47 +0100 Subject: Optimize slots: avoid temporary PyMethodObject Issue #29507: Optimize slots calling Python methods. For Python methods, get the unbound Python function and prepend arguments with self, rather than calling the descriptor which creates a temporary PyMethodObject. Add a new _PyObject_FastCall_Prepend() function used to call the unbound Python method with self. It avoids the creation of a temporary tuple to pass positional arguments. Avoiding temporary PyMethodObject and avoiding temporary tuple makes Python slots up to 1.46x faster. Microbenchmark on a __getitem__() method implemented in Python: Median +- std dev: 121 ns +- 5 ns -> 82.8 ns +- 1.0 ns: 1.46x faster (-31%) Co-Authored-by: INADA Naoki --- Include/abstract.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Include/abstract.h') diff --git a/Include/abstract.h b/Include/abstract.h index 231e209b03..03e2f024a1 100644 --- a/Include/abstract.h +++ b/Include/abstract.h @@ -257,6 +257,12 @@ PyAPI_FUNC(PyObject *) _PyObject_Call_Prepend( PyObject *args, PyObject *kwargs); +PyAPI_FUNC(PyObject *) _PyObject_FastCall_Prepend( + PyObject *callable, + PyObject *obj, + PyObject **args, + Py_ssize_t nargs); + PyAPI_FUNC(PyObject *) _Py_CheckFunctionResult(PyObject *callable, PyObject *result, const char *where); -- cgit v1.2.1