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Subject: Re: [isocpp-lib-ext] [isocpp-parallel] Reducing the number of numeric algorithms in namespace ranges
From: Christopher Di Bella (cjdb.ns_at_[hidden])
Date: 2019-06-27 06:44:37


On Thu, 27 Jun 2019 at 12:08, Bryce Adelstein Lelbach aka wash <
brycelelbach_at_[hidden]> wrote:

> Thanks Billy and Jonathan. This is really interesting data to have. I
> hadn't realized how big of an impact this was!
>

+1

I'm very appreciative for the data here too; at the very least, it's super
interesting! It also certainly underlines caution received in this thread
about marrying the C++98 algorithms with the C++17 ones.
I'm sceptical about there being a usable, non-intrusive, and universal way
to marry the two, but will give it some thought.

Perhaps the initial proposal should only cover the C++98 numeric algorithms
to lay the groundwork, and have a sequel look at the C++17 ones?
Just covering the C++98 algorithms will be moderately sized.

>
> On Thu, Jun 27, 2019 at 2:25 AM Jonathan Wakely <cxx_at_[hidden]> wrote:
>
>>
>>
>> On Tue, 25 Jun 2019 at 19:25, Billy O'Neal (VC LIBS) via Lib-Ext <
>> lib-ext_at_[hidden]> wrote:
>>
>>> To put some numbers to that, on our (MSVC++’s) implementation:
>>>
>>>
>>>
>>>
>>>
>>
>> Roughly comparable numbers using GCC (where the reduce_par algo uses
>> Intel's PSTL and TBB), so I think it's safe to say that std::reduce is
>> valuable even in the non-parallel case:
>>
>> [image: reduce.png]
>>
>>
>> _______________________________________________
>> Parallel mailing list
>> Parallel_at_[hidden]
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>> Link to this post: http://lists.isocpp.org/parallel/2019/06/2753.php
>>
>
>
> --
> Bryce Adelstein Lelbach aka wash
> CUDA Core C++ Libraries (Thrust, CUB, libcu++) Lead @ NVIDIA
> ISO C++ Library Evolution Incubator Chair
> ISO C++ Tooling Chair
> CppCon and C++Now Program Chair
> CUDA Convert and Reformed AVX Junkie
>
> Sleep is for the weak
> --
> _______________________________________________
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> Lib-Ext_at_[hidden]
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> Link to this post: http://lists.isocpp.org/lib-ext/2019/06/12008.php
>




19D76826F0A44A619012717C96F5C229.png
reduce.png

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