From: Raymond Hettinger <python@rcn.com>
Date: Fri, 25 Mar 2016 09:29:59 +0000 (-0700)
Subject: Speed-up construction of empty sets by approx 12-14%.
X-Git-Tag: v3.6.0a1~335
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b72e21b9ab8021b7cbb7e0007d1bf80d533bce15;p=thirdparty%2FPython%2Fcpython.git

Speed-up construction of empty sets by approx 12-14%.
---

diff --git a/Objects/setobject.c b/Objects/setobject.c
index c9834a89e2b3..8e22b690206e 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -2015,11 +2015,12 @@ set_init(PySetObject *self, PyObject *args, PyObject *kwds)
 
     if (!PyAnySet_Check(self))
         return -1;
-    if (PySet_Check(self) && !_PyArg_NoKeywords("set()", kwds))
+    if (kwds != NULL && PySet_Check(self) && !_PyArg_NoKeywords("set()", kwds))
         return -1;
     if (!PyArg_UnpackTuple(args, Py_TYPE(self)->tp_name, 0, 1, &iterable))
         return -1;
-    set_clear_internal(self);
+    if (self->fill)
+        set_clear_internal(self);
     self->hash = -1;
     if (iterable == NULL)
         return 0;