commit 37faed2532b3baf3b24cd4839aa5f5242b0c807d
author Tim Peters <tim.peters@gmail.com> Sun Aug 25 19:21:27 2002 +0000
committer Tim Peters <tim.peters@gmail.com> Sun Aug 25 19:21:27 2002 +0000
tree f203c5cb70ca90256e7edd62c5d61e7715f952a8
parent d33e6be59df8cd8ba701d744ffc2fc7e2d483daa

Sped union by a factor of 3-4.

Lib/sets.py

diff --git a/Lib/sets.py b/Lib/sets.py
index e88e845..10138fc 100644
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -154,7 +154,8 @@
         """
         if not isinstance(other, BaseSet):
             return NotImplemented
-        result = self.__class__(self._data)
+        result = self.__class__()
+        result._data = self._data.copy()
         result._data.update(other._data)
         return result