Index: /sqlalchemy/trunk/lib/sqlalchemy/util.py
===================================================================
--- /sqlalchemy/trunk/lib/sqlalchemy/util.py (revision 6421)
+++ /sqlalchemy/trunk/lib/sqlalchemy/util.py (revision 6483)
@@ -646,5 +646,5 @@
vals = list(vals)
t = tuple.__new__(cls, vals)
- t.__dict__ = dict(zip(labels, vals))
+ t.__dict__ = dict(itertools.izip(labels, vals))
t._labels = labels
return t