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

Victor Stinner vstinner at redhat.com
Wed Jul 11 04:50:15 EDT 2018

2018-07-11 2:12 GMT+02:00 INADA Naoki <songofacandy at gmail.com>:

If my idea has 50% gain and current PEP 580 has only 5% gain, why we should accept PEP 580? But no one know real gain, because there are no realistic application which bottleneck is calling overhead.

I'm skeptical about "50% gain": I want to see a working implementation and reproduce benchmarks myself to believe that :-) As you wrote, the cost of function costs is unlikely the bottleneck of application.

Sorry, I didn't read all these PEPs about function calls, but IMHO a minor speedup on micro benchmarks must not drive a PEP. If someone wants to work on CPython performance, I would suggest to think bigger and target 2x speedup on applications. To get to this point, the bottleneck is the C API and so we have to fix our C API first.

http://vstinner.readthedocs.io/python_new_stable_api.html

Victor

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