[Python-Dev] BDFL-Delegate appointments for several PEPs

[Jeroen Demeyer]

On 2019-03-27 14:50, Petr Viktorin wrote:
> The pre-PEP claims speedups of 2% in initial experiments, with
> expected overall performance gain of 4% for the standard benchmark
> suite. That's pretty big.

I re-did my earlier benchmarks for PEP 580 and these are the results:
https://gist.github.com/jdemeyer/f0d63be8f30dc34cc989cd11d43df248

In general, the PEP 580 timings seem slightly better than vanilla 
CPython, similar to what Mark got. I'm speculating that the speedup in 
both cases comes from the removal of type checks and dispatching 
depending on that, and instead using a single protocol that directly 
does what needs to be done.


Jeroen.