changeset:   102757:89e4ad001f3d
user:        Victor Stinner <victor.stinner@gmail.com>
date:        Fri Aug 19 16:42:42 2016 +0200
files:       Python/ceval.c
description:
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 -r a1a29d20f52d -r 89e4ad001f3d Python/ceval.c
--- a/Python/ceval.c	Fri Aug 19 16:11:43 2016 +0200
+++ b/Python/ceval.c	Fri Aug 19 16:42:42 2016 +0200
@@ -4592,6 +4592,10 @@
 #endif
 
     if (arg == NULL) {
+        if (kw == NULL) {
+            return _PyObject_FastCall(func, NULL, 0, 0);
+        }
+
         arg = PyTuple_New(0);
         if (arg == NULL)
             return NULL;