Re: [Python-Dev] Experiment an opt-in new C API for Python? (leave current API unchanged)

2018年11月21日 03:11:59 -0800

On 2018年11月20日 23:17:05 +0100
Victor Stinner <[email protected]> wrote:
> Le mar. 20 nov. 2018 à 23:08, Stefan Krah <[email protected]> a écrit :
> > Intuitively, it should probably not be part of a limited API, but I never
> > quite understood the purpose of this API, because I regularly need any
> > function that I can get my hands on.
> > (...)
> > Reading typed strings directly into an array with minimal overhead. 
> 
> IMHO performance and hiding implementation details are exclusive. You
> should either use the C API with impl. details for best performances,
> or use a "limited" C API for best compatibility.
> 
> Since I would like to not touch the C API with impl. details, you can
> imagine to have two compilation modes: one for best performances on
> CPython, one for best compatibility (ex: compatible with PyPy). I'm
> not sure how the "compilation mode" will be selected.
You mean the same API can compile to two different things depending on
a configuration?
I expect it to be error-prone. For example, let's suppose I want to
compile in a given mode, but I also use Numpy's C API. Will the
compile mode "leak" to Numpy as well? What if a third-party header
includes "Python.h" before I do the "#define" that's necessary?
Regards
Antoine.
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