From bb86bf4c4eaa30b1f5192dab9f389ce0bb61114d Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Tue, 11 Dec 2018 08:28:18 +0200
Subject: bpo-35444: Unify and optimize the helper for getting a builtin
 object. (GH-11047)

This speeds up pickling of some iterators.

This fixes also error handling in pickling methods when fail to
look up builtin "getattr".
---
 Modules/itertoolsmodule.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'Modules/itertoolsmodule.c')

diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index 89c0280c9d..581ae2c67e 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -368,8 +368,9 @@ _grouper_next(_grouperobject *igo)
 static PyObject *
 _grouper_reduce(_grouperobject *lz, PyObject *Py_UNUSED(ignored))
 {
+    _Py_IDENTIFIER(iter);
     if (((groupbyobject *)lz->parent)->currgrouper != lz) {
-        return Py_BuildValue("N(())", _PyObject_GetBuiltin("iter"));
+        return Py_BuildValue("N(())", _PyEval_GetBuiltinId(&PyId_iter));
     }
     return Py_BuildValue("O(OO)", Py_TYPE(lz), lz->parent, lz->tgtkey);
 }
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