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Date: Thu, 1 Sep 2016 20:07:42 +0800
Message-ID: <CABBJUpfyNU1Pa52FzK=-DQ2gveXS8HzoNtcf7UBZYtY+Jn2RCw@mail.gmail.com>
To: Dmitry Stogov <dmitry@zend.com>
Cc: PHP internals list <internals@lists.php.net>, Zeev Suraski <zeev@zend.com>
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Subject: Re: [PHP-DEV] JIT for PHP project
From: xinchen.h@zend.com (Xinchen Hui)

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Hey:

On Thu, Sep 1, 2016 at 7:57 PM, Dmitry Stogov <dmitry@zend.com> wrote:

> Hi @internals,
>
> I'm glad to say that we have started a new JIT for PHP project and hope to
> deliver some useful results for the next PHP version (probably 8.0).
> We are very early in the process and for now there isn't any real
> performance improvement yet.  So far we spent just 2 weeks mainly working
> on JIT infrastructure for x86/x86_64 Linux (machine code generation,
> disassembling, debugging, profiling, etc), and we especially made the JIT
> code-generator as minimal and simple as possible. The current state, is
> going to be used as a starting point for research of different JIT
> approaches and their usability for PHP.
>
> The code is available at: https://github.com/zendtech/
> php-src/tree/jit-dynasm/ext/opcache/jit
>
> The sources may be built and tested as regular PHP (no any special
> external dependencies required).
> JIT itself is implemented as a part of Opcache.
> You may try it in action:
>
> sapi/cli/php -d opcache.jit_buffer_size=32M Zend/bench.php
> sapi/cli/php -d opcache.jit_buffer_size=32M -d opcache.jit_debug=1
> Zend/bench.php 2>&1 | less
>
> As I mentioned we didn't try to achieve any real performance improvement
> yet, although we do currently see 20% speedup on bench.php, but a bit of a
> slowdown on real-life apps.
>
Actually,  if you are lucky like me, you may see like 5% improvement on
wordpress. :)

thanks

>
> Wish us luck :)
>
> Thanks. Dmitry.
>
>


-- 
Xinchen Hui
@Laruence
http://www.laruence.com/

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