[pypy-dev] [pypy-commit] pypy cpyext-faster-arg-passing: document branch

[Carl Friedrich Bolz-Tereick]

Hi Anto,

Yes, I ran your benchmarks and they are improved, particularly the ones that pass arguments. I need to rerun them now that I merged default. However, I would prefer it if we could find a real life cpyext benchmark (maybe using numpy?).

Cheers,

Carl Friedrich 

Carl Friedrich

On January 31, 2018 1:16:15 PM GMT+01:00, Antonio Cuni <anto.cuni at gmail.com> wrote:
>Hi Carl,
>wow, this looks awesome. Did you run benchmarks to measure the speedup?
>If
>yes, should we add them to my repo?
>https://github.com/antocuni/cpyext-benchmarks
>
>ciao,
>Anto
>
>On Tue, Jan 30, 2018 at 1:31 PM, cfbolz <pypy.commits at gmail.com> wrote:
>
>> Author: Carl Friedrich Bolz-Tereick <cfbolz at gmx.de>
>> Branch: cpyext-faster-arg-passing
>> Changeset: r93724:627a1425607c
>> Date: 2018-01-30 14:30 +0100
>> http://bitbucket.org/pypy/pypy/changeset/627a1425607c/
>>
>> Log:    document branch
>>
>> diff --git a/pypy/doc/whatsnew-head.rst b/pypy/doc/whatsnew-head.rst
>> --- a/pypy/doc/whatsnew-head.rst
>> +++ b/pypy/doc/whatsnew-head.rst
>> @@ -23,3 +23,11 @@
>>  added, then the performance using mapdict is linear in the number of
>>  attributes. This is now fixed (by switching to a regular dict after
>80
>>  attributes).
>> +
>> +
>> +.. branch: cpyext-faster-arg-passing
>> +
>> +When using cpyext, improve the speed of passing certain objects from
>PyPy
>> to C
>> +code, most notably None, True, False, types, all instances of
>C-defined
>> types.
>> +Before, a dict lookup was needed every time such an object crossed
>over,
>> now it
>> +is just a field read.
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