On Jul 23, 2019, at 08:44, Steve Dower <steve.do...@python.org> wrote:

> The @public decorator is basically:
> 
> def public(fn):
>    __all__.append(fn.__name__)
>    return fn
> 
> It's trivial, but it adds a runtime overhead that is also trivially avoided 
> by putting the name in __all__ manually. And once it's public API, we 
> shouldn't be making it too easy to rename the function anyway ;)

My package has a C version.  If public() were a builtin (which I’ve 
implemented) it wouldn’t have that much import time overhead.

-Barry

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