From: Victor Stinner <victor.stinner@gmail.com>
Date: Fri, 19 Aug 2016 14:42:42 +0000 (+0200)
Subject: PyEval_CallObjectWithKeywords() uses fast call
X-Git-Tag: v3.6.0b1~663
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3f745bf1d90a75a0e3df5ba4d59b3ffbb71e3ebc;p=python

PyEval_CallObjectWithKeywords() uses fast call

Issue #27128: Modify PyEval_CallObjectWithKeywords() to use
_PyObject_FastCall() when args==NULL and kw==NULL. It avoids the creation of a
temporary empty tuple for positional arguments.
---

diff --git a/Python/ceval.c b/Python/ceval.c
index b9b21d14be..75eaa8110a 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -4592,6 +4592,10 @@ PyEval_CallObjectWithKeywords(PyObject *func, PyObject *arg, PyObject *kw)
 #endif
 
     if (arg == NULL) {
+        if (kw == NULL) {
+            return _PyObject_FastCall(func, NULL, 0, 0);
+        }
+
         arg = PyTuple_New(0);
         if (arg == NULL)
             return NULL;