[Python-Dev] New calling convention to avoid temporarily tuples when calling functions

[Yury Selivanov]

On 2016-08-08 6:53 PM, Victor Stinner wrote:

> 2016-08-09 0:40 GMT+02:00 Guido van Rossum <guido at python.org>:
>>> tl;dr I found a way to make CPython 3.6 faster and I validated that
>>> there is no performance regression.
>> But is there a performance improvement?
> Sure.
>
>
> On micro-benchmarks, you can see nice improvements:
>
> * getattr(1, "real") becomes 44% faster
> * list(filter(lambda x: x, list(range(1000)))) becomes 31% faster
> * namedtuple.attr becomes -23% faster
> * etc.
>
> See https://bugs.python.org/issue26814#msg263999 for default => patch,
> or https://bugs.python.org/issue26814#msg264003 for comparison python
> 2.7 / 3.4 / 3.5 / 3.6 / 3.6 patched.
>
>
> On the CPython benchmark suite, I also saw many faster benchmarks:
>
> Faster (25):
> - pickle_list: 1.29x faster
> - etree_generate: 1.22x faster
> - pickle_dict: 1.19x faster
> - etree_process: 1.16x faster
> - mako_v2: 1.13x faster
> - telco: 1.09x faster
> - raytrace: 1.08x faster
> - etree_iterparse: 1.08x faster
> (...)
>

Exceptional results, congrats Victor. Will be happy to help with code 
review.

Yury