[Python-Dev] Benchmarks why we need PEP 576/579/580 (original) (raw)

Jeroen Demeyer J.Demeyer at UGent.be
Sat Jul 21 13:59:19 EDT 2018

On 2018-07-21 19:07, INADA Naoki wrote:

Good job. But I already +1 for adding support for extension callable type. Do you think this benchmark can be optimized more in future optimization which is possible by PEP 580, but not 576?

I should clarify that the benchmark did not involve an implementation of PEP 576 or PEP 580. It simply shows what kind of regressions one gets when not implementing something like those PEPs.

So this can't be used to compare PEP 576 versus PEP 580. I still think that PEP 576 would slow down bound method calls but without a reference implementation, I can only guess. (I know that PEP 576 claims a reference implementation but it doesn't correspond to the PEP. I'm basing myself on the text of PEP 576, not the "reference implementation".)

Do you mean you backport LOADMETHOD and fastcall to Python 2.7 for benchmarking?

No, I did not. This is just benchmarking the difference between tp_call and more specialized call functions (In Python 2.7, that is call_function()).

Jeroen.

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