I was under the impression that using a class (with `__slots__` set) or a tuple ...

eevee · on Oct 1, 2013

The attributes of an object (and its class) are generally stored in a literal dictionary, so it's unlikely that a class will be more performant.

What a class buys you is behavior and a semi-defined interface.

burntsushi · on Oct 1, 2013

Uhh... Did you not see my parenthetical reference to `__slots__`? See this SO post[1] for more details.

[1] - http://stackoverflow.com/questions/472000/python-slots

eevee · on Oct 1, 2013

Whoops! I could've sworn that said "without", sorry :)

Though I'm not sure `__slots__` actually saves any time, as it's really a space optimization. I've tried it before for hot code and even seen very slight (probably not significant) slowdowns.