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Date: Fri, 26 Oct 2018 17:23:03 -0700
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To: Sara Golemon <pollita@php.net>
Cc: PHP internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary="00000000000083a15105792ad70c"
Subject: Re: [PHP-DEV] Extension: arbitrary precision decimal arithmetic in
 PHP 7
From: rtheunissen@php.net (Rudi Theunissen)

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Hi everyone,

I've made some good progress on this project and I would love for someone
to review it for me? I want to learn as much as I can to produce something
as good as possible.

if you are curious to see it in action first, there is a sandbox here:
http://php-decimal.io/#sandbox

Source is here: https://github.com/php-decimal/extension

Thank you. :)

Rudi

On Sat, Sep 29, 2018 at 10:45 AM Rudi Theunissen <rtheunissen@php.net>
wrote:

> GNU MPFR looks solid too, significantly faster because it uses base 2
> storage, but may have difficulty converting to decimal. I'll fork a versi=
on
> that uses mpfr instead of libmpdec and add it to the benchmark. I know
> using basic + and - isn't much of a benchmark but it's a start.
>
> I believe that many projects, especially in finance and science, can
> benefit from a fast, friendly, PHP 7+ decimal library.
>
> On Sat, Sep 29, 2018, 10:25 Rudi Theunissen <rtheunissen@php.net> wrote:
>
>> I wrote a basic benchmark and GMPi appears to be about twice as fast (+
>> and - ops) but produces a different result. GMPi was also running out of
>> memory when attempting to apply multiply and divide operators. The
>> benchmark only uses + and - now.
>>
>> I used bcmath for the reference value.
>>
>> If there's a bug we can solve here, rather than a fundamental accuracy
>> issue, GMPi looks promising. =F0=9F=98=8A
>>
>> See: https://gist.github.com/rtheunissen/973ea1719c02a4204dabfe9dffd78c4=
b
>>
>>
>> On Sat, Sep 29, 2018, 07:20 Sara Golemon <pollita@php.net> wrote:
>>
>>> On Fri, Sep 28, 2018 at 6:06 PM Rudi Theunissen <rtheunissen@php.net>
>>> wrote:
>>> > I've been working on adding arbitrary precision decimal support as an
>>> > alternative to *bcmath. *I have created an extension based on
>>> *mpdecimal*,
>>> > which is what Python 3's decimal module is also based on. I haven't
>>> > released or broadcast this project yet, because I wanted to discuss
>>> the API
>>> > and implementation with internals first.
>>> >
>>> Have you looked at GMPi ? https://github.com/sgolemon/gmpi
>>> It's a replacement for GMP (which includes floating point and an OOP
>>> interface).
>>>
>>> -Sara
>>>
>>

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