On Sun, 07 Oct 2007 13:24:14 -0700, Alex Martelli wrote:
> And yes, you CAN save about 1/3 of those 85 nanoseconds by having
> '__slots__=["zop"]' in your class A(object)... but that's the kind of
> thing one normally does only to tiny parts of one's program that have
> been identified by profiling as dramatic bottlenecks
Seems to me that:
class Record(object):
__slots__ = ["x", "y", "z"]
has a couple of major advantages over:
class Record(object):
pass
aside from the micro-optimization that classes using __slots__ are faster
and smaller than classes with __dict__.
(1) The field names are explicit and self-documenting;
(2) You can't accidentally assign to a mistyped field name without Python
letting you know immediately.
Maybe it's the old Pascal programmer in me coming out, but I think
they're big advantages.
--
Steven.
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