[Python-Dev] Benchmarks why we need PEP 576/579/580

[INADA Naoki]

>
> I am comparing calls through tp_call (A) versus optimized call paths
> (B). I only need to assume that the speed improvements to (A) between
> 2.7 and 3.7 are not bigger than the speed improvements to (B).
>

It's interesting... But I failed to build sage.  It's build step is
too different from
normal Python package.  It tooks very long time to build.  And
"install from source"
document only describe step to `./sage` command work.  It doesn't describe
step to `improt sage` works.

I feel it's not suitable for target application for discussing future
optimization.
Target application should be easy to test, benchmark and profile for all of
core-devs interesting in these PEPs.