Hi Simon,
> On 2012-03-28, Florent Hivert <florent.hiv...@lri.fr> wrote:
> >> For parameter-less categories like Fields, I don't have a feeling for
> >> whether one should teach new users to use the idiom ``X in Fields`` or
> >> ``X in Fields()``. I tend to use the later mysefl.
> >
> > Speed could be a (not so important) argument.
>
> Not so important??? I take speed very seriously. And by the way, testing
> containment is even faster if you assign Fields() to a
> constant, e.g.
I'm not saying that speed is not important in general. We where discussing
about syntax and teaching to new commers, as opposite to hardcore
optimization. In this context I don't think speed is a major
argument. Moreover, if needed, "QQ in Fields" could certainly be way optimized
(using Cython / better mro handling, etc). So speed *currently* shouldn't be
considered as a serious argument for deciding which syntax we need. After, the
proper syntax / usage is defined we certainly will think about speed.
Cheers,
Florent
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