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[Python-Dev] General concerns about C API changes


On Sun, Nov 18, 2018 at 8:52 AM Stefan Behnel <stefan_ml at behnel.de> wrote:
>
> Gregory P. Smith schrieb am 15.11.18 um 01:03:
> > From my point of view: A static inline function is a much nicer modern code
> > style than a C preprocessor macro.
>
> It's also slower to compile, given that function inlining happens at a much
> later point in the compiler pipeline than macro expansion. The C compiler
> won't even get to see macros in fact, whereas whether to inline a function
> or not is a dedicated decision during the optimisation phase based on
> metrics collected in earlier stages. For something as ubiquitous as
> Py_INCREF/Py_DECREF, it might even be visible in the compilation times.

Have you measured this? I had the opposite intuition, that macros on
average will be slower to compile because they increase the amount of
code that the frontend has to process. But I've never checked...

-n

-- 
Nathaniel J. Smith -- https://vorpus.org