changeset:   102782:c2af917bde71
user:        Victor Stinner <victor.stinner@gmail.com>
date:        Sat Aug 20 00:44:04 2016 +0200
files:       Objects/fileobject.c
description:
PyFile_WriteObject() now uses fast call

Issue #27128: PyFile_WriteObject() now calls _PyObject_FastCall() to avoid the
creation of a temporary tuple.


diff -r 3ab32f7add6e -r c2af917bde71 Objects/fileobject.c
--- a/Objects/fileobject.c	Fri Aug 19 18:59:15 2016 +0200
+++ b/Objects/fileobject.c	Sat Aug 20 00:44:04 2016 +0200
@@ -127,7 +127,7 @@
 int
 PyFile_WriteObject(PyObject *v, PyObject *f, int flags)
 {
-    PyObject *writer, *value, *args, *result;
+    PyObject *writer, *value, *result;
     _Py_IDENTIFIER(write);
 
     if (f == NULL) {
@@ -146,14 +146,7 @@
         Py_DECREF(writer);
         return -1;
     }
-    args = PyTuple_Pack(1, value);
-    if (args == NULL) {
-        Py_DECREF(value);
-        Py_DECREF(writer);
-        return -1;
-    }
-    result = PyEval_CallObject(writer, args);
-    Py_DECREF(args);
+    result = _PyObject_FastCall(writer, &value, 1, NULL);
     Py_DECREF(value);
     Py_DECREF(writer);
     if (result == NULL)