[Python-Dev] PEP 580/590 discussion (original) (raw)

Mark Shannon mark at hotpy.org
Tue Apr 2 15:38:23 EDT 2019

Hi,

On 01/04/2019 6:31 am, Jeroen Demeyer wrote:

I added benchmarks for PEP 590:

https://gist.github.com/jdemeyer/f0d63be8f30dc34cc989cd11d43df248

Thanks. As expected for calls to C function for both PEPs and master perform about the same, as they are using almost the same calling convention under the hood.

As an example of the advantage that a general fast calling convention gives you, I have implemented the vectorcall versions of list() and range()

https://github.com/markshannon/cpython/compare/vectorcall-minimal...markshannon:vectorcall-examples

Which gives a roughly 30% reduction in time for creating ranges, or lists from small tuples.

https://gist.github.com/markshannon/5cef3a74369391f6ef937d52cca9bfc8

Cheers, Mark.

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