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Malcolm Tredinnick 93baa3e417 queryset-refactor: Optimised some internal data structures in sql/query.py.
Mostly this involves changing them to a "copy on write" implementation, which
speeds up cloning (and the relevant structures aren't updated very frequently).


git-svn-id: http://code.djangoproject.com/svn/django/branches/queryset-refactor@7247 bcc190cf-cafb-0310-a4f2-bffc1f526a37
2008-03-15 09:13:22 +00:00
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2007-09-13 02:56:31 +00:00