From 9def0901e23c6d655f28b7e5711874033b5ff5bd Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Sat, 20 Aug 2016 00:44:04 +0200
Subject: [PATCH] PyFile_WriteObject() now uses fast call

Issue #27128: PyFile_WriteObject() now calls _PyObject_FastCall() to avoid the
creation of a temporary tuple.
---
 Objects/fileobject.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 234d07e5c6754d..83348a8ee3c79a 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -127,7 +127,7 @@ PyFile_GetLine(PyObject *f, int n)
 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 @@ PyFile_WriteObject(PyObject *v, PyObject *f, int flags)
         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)