On 2/20/07, Steven Bethard <[EMAIL PROTECTED]> wrote: > Declare a simple class for your type and you're ready to go:: > > >>> class Point(Record): > ... __slots__ = 'x', 'y' > ... > >>> Point(3, 4) > Point(x=3, y=4)
Here's a brief comparison between Raymond's NamedTuple factory (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/500261) and my Record class (http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502237). Given a ``records`` module containing the recipes and the following code:: class RecordPoint(Record): __slots__ = 'x', 'y' NamedTuplePoint = NamedTuple('NamedTuplePoint x y') I got the following times from timeit:: $ python -m timeit -s "import records; Point = records.RecordPoint" "Point(1, 2)" 1000000 loops, best of 3: 0.856 usec per loop $ python -m timeit -s "import records; Point = records.NamedTuplePoint" "Point(1, 2)" 1000000 loops, best of 3: 1.59 usec per loop $ python -m timeit -s "import records; point = records.RecordPoint(1, 2)" "point.x; point.y" 10000000 loops, best of 3: 0.209 usec per loop $ python -m timeit -s "import records; point = records.NamedTuplePoint(1, 2)" "point.x; point.y" 1000000 loops, best of 3: 0.551 usec per loop $ python -m timeit -s "import records; point = records.RecordPoint(1, 2)" "x, y = point" 1000000 loops, best of 3: 1.47 usec per loop $ python -m timeit -s "import records; point = records.NamedTuplePoint(1, 2)" "x, y = point" 10000000 loops, best of 3: 0.155 usec per loop In short, for object construction and attribute access, the Record class is faster (because __init__ is a simple list of assignments and attribute access is through C-level slots). For unpacking and iteration, the NamedTuple factory is faster (because it's using the C-level tuple iteration instead of a Python-level generator). STeVe -- I'm not *in*-sane. Indeed, I am so far *out* of sane that you appear a tiny blip on the distant coast of sanity. --- Bucky Katt, Get Fuzzy _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
