[Python-Dev] Micro-benchmarks for PEP 580 (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Tue Jul 10 09:20:21 EDT 2018

On Tue, 10 Jul 2018 21:59:28 +0900 INADA Naoki <songofacandy at gmail.com> wrote:

Then, the function is called from another C extension like this: PyObjectCallFunction(func, "n", 42); Currently, we create temporary long object for passing argument. If there is protocol for exposeing format used by PyArgParse*, we can bypass temporal Python object and call myfuncimpl directly.

This is another can of worms to open. If you're worried about the added complexity of PEP 580, what you're proposing is one or two orders of magnitude more complicated.

I think optimization like this idea can boost application performance using Cython heavily.

You can already define the C signature of a function in Cython and intra-Cython calls will benefit from it where possible. Cooperation from core Python is not necessary for that.

The main point of PEP 580 is to make Cython functions faster when called from pure Python, not from other Cython functions.

Regards

Antoine.

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