Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:103282
MIME-Version: 1.0
References: <CAHFNTwehcSi_Dn6jYUs71Z0bbTc_NB1tjmNGMT=2tsi4PwxsXg@mail.gmail.com>
 <CAESVnVoCCR3-pnKgqX8n+gSOUG-k_YwY4T9HeEd+M6E5suctEg@mail.gmail.com>
In-Reply-To: <CAESVnVoCCR3-pnKgqX8n+gSOUG-k_YwY4T9HeEd+M6E5suctEg@mail.gmail.com>
Date: Sat, 29 Sep 2018 10:25:35 -0700
Message-ID: <CAHFNTwevyucdmrcPa7VqhvO2dcvnBdLz5UMxh9VM01YwN7JHRw@mail.gmail.com>
To: Sara Golemon <pollita@php.net>
Cc: PHP internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary="000000000000c137a9057705dc41"
Subject: Re: [PHP-DEV] Extension: arbitrary precision decimal arithmetic in
 PHP 7
From: rtheunissen@php.net (Rudi Theunissen)

--000000000000c137a9057705dc41
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

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/973ea1719c02a4204dabfe9dffd78c4b


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
>

--000000000000c137a9057705dc41--