From: Tim Peters <tim.peters@gmail.com>
Date: Sun, 25 Aug 2002 19:47:54 +0000 (+0000)
Subject: Gave __xor__/symmetric_difference a factor of 2-5 speed boost.
X-Git-Tag: v2.3c1~4288
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=334b4a5c393fba0b3cf37ed88b36cbd554a24f4f;p=thirdparty%2FPython%2Fcpython.git

Gave __xor__/symmetric_difference a factor of 2-5 speed boost.
---

diff --git a/Lib/sets.py b/Lib/sets.py
index 10138fca5e1a..bf3ff4df5ea7 100644
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -197,11 +197,13 @@ class BaseSet(object):
         result = self.__class__()
         data = result._data
         value = True
-        for elt in self:
-            if elt not in other:
+        selfdata = self._data
+        otherdata = other._data
+        for elt in selfdata:
+            if elt not in otherdata:
                 data[elt] = value
-        for elt in other:
-            if elt not in self:
+        for elt in otherdata:
+            if elt not in selfdata:
                 data[elt] = value
         return result