From b8940393e9be5be09920f28bfea0049e4255354b Mon Sep 17 00:00:00 2001
From: Tim Peters <tim.peters@gmail.com>
Date: Sun, 25 Aug 2002 19:50:43 +0000
Subject: Gave __sub__/difference a factor of 2-5 speed boost.

---
 Lib/sets.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/sets.py b/Lib/sets.py
index bf3ff4d..4665373 100644
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -223,9 +223,10 @@ class BaseSet(object):
             return NotImplemented
         result = self.__class__()
         data = result._data
+        otherdata = other._data
         value = True
         for elt in self:
-            if elt not in other:
+            if elt not in otherdata:
                 data[elt] = value
         return result
 
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