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

Gave xor/symmetric_difference a factor of 2-5 speed boost.
334b4a5c · Tim Peters · 37faed25 · 334b4a5c
Commit 334b4a5c authored Aug 25, 2002 by Tim Peters
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Showing with 6 additions and 4 deletions

Lib/sets.py Lib/sets.py +6 -4

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--- 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:
+        selfdata = self._data
-            if elt not in other:
+        otherdata = other._data
+        for elt in selfdata:
+            if elt not in otherdata:
                data[elt] = value
-        for elt in other:
+        for elt in otherdata:
-            if elt not in self:
+            if elt not in selfdata:
                data[elt] = value
        return result