[Python-Dev] "Micro-optimisations can speed up CPython"

[Serhiy Storchaka]

29.05.17 17:15, Serhiy Storchaka пише:
> 29.05.17 15:13, Antoine Pitrou пише:
>> I hope readers won't get bothered by what is mostly a link to blogpost
>> (well, two of them :-)), but I suspect there at least 2 or 3 people
>> who might be interested in the following analysis:
>> https://www.corsix.org/content/compilers-cpython-interpreter-main-loop
>> http://www.corsix.org/content/micro-optimisations-can-speed-up-cpython
> 
> Interesting articles, thank you. I wonder why the author doesn't propose 
> his patches for CPython. Does he fear that CPython can become faster 
> than Lua? ;-)
> 
> And the following article should be especially interesting for Victor:
> 
> https://www.corsix.org/content/why-are-slots-so-slow
> 
> The part of optimizations already are applied in 3.6 and 3.7, but `a + 
> b` still is slower than `a.__add__(b)`.

See https://bugs.python.org/issue30509. All optimizations already are 
applied in 3.7 by Victor. In these microbenchmarks 3.7 is much faster 
than 2.7 and 3.5. But still there is some overhead due to excess 
intermediate levels.