From bd5f0e8c1cf633a238c10e1d3199c0d572a4df1d Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Fri, 9 Oct 2015 01:34:08 -0400
Subject: [PATCH] Hoist constant expression out of the inner loop.

---
 Python/bltinmodule.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 3f2e2c004e..3c8f1e9841 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -469,6 +469,7 @@ filter_next(filterobject *lz)
     PyObject *it = lz->it;
     long ok;
     PyObject *(*iternext)(PyObject *);
+    int checktrue = lz->func == Py_None || lz->func == (PyObject *)&PyBool_Type;
 
     iternext = *Py_TYPE(it)->tp_iternext;
     for (;;) {
@@ -476,12 +477,11 @@ filter_next(filterobject *lz)
         if (item == NULL)
             return NULL;
 
-        if (lz->func == Py_None || lz->func == (PyObject *)&PyBool_Type) {
+        if (checktrue) {
             ok = PyObject_IsTrue(item);
         } else {
             PyObject *good;
-            good = PyObject_CallFunctionObjArgs(lz->func,
-                                                item, NULL);
+            good = PyObject_CallFunctionObjArgs(lz->func, item, NULL);
             if (good == NULL) {
                 Py_DECREF(item);
                 return NULL;
-- 
2.50.1