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Date: Tue, 6 May 2014 12:34:32 +0400
Message-ID: <CA+9eiLtYjpqOho2peqMD_H9AMU6FB4U6_SkYBnQC00YmY8ahYQ@mail.gmail.com>
To: Anatol Belski <anatol.php@belski.net>
Cc: Pierre Joye <pierre.php@gmail.com>, PHP Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=089e0122f2cefe4fcc04f8b71d98
Subject: Re: [PHP-DEV] phpng: Refactored PHP Engine with Big Performance Improvement
From: dmitry@zend.com (Dmitry Stogov)

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On Tue, May 6, 2014 at 12:21 PM, Anatol Belski <anatol.php@belski.net>wrote:

> Hi Dmitry,
>
> On Tue, May 6, 2014 09:31, Dmitry Stogov wrote:
> > Hi Anatol,
> >
> >
> > i agree that coordination from beginning would make some thing easier,
> > but I hardly believe we would able to do the PoC in short time with
> > endless discussions.
> >
> > Lets take what we have now.
> > I understand what you are not glad to do the same work once again.
> > I make take some part of this work, if we come to agreement.
> >
> Yep, we have what we have now, so lets take it as the basis. I do not shy
> to take that effort as well, not a question at all.
>

great!


>
> >
> > According to performance, I wouldn't believe to anything except tests.
> > and it's why I propose to start with the part that can't make any harm.
> >
> Yeah, there is almost no diff if you look here
>
> http://windows.php.net/downloads/snaps/ostc/pftt/perf/results-20140411-masterr6c2f7bc-str_size_and_int64raa0c920.html
> (that's also linked from the RFC). Many scripting languages do support
> that like python and ruby and seem to have no harm. AFAIR Python even
> implements int64 on 32 bit platforms. So IMHO it really makes sense too
> keep both as then we have a balance between the functionality and
> performance, both will have a gain and both can get further improvement in
> the future.
>

It's the reason why we are faster :)

support for both int32 and int64 is going to be a big overhead even on
64-bit platforms. (I implemented and tested it about 8 years ago).
Each math opcdoe (ZEND_ADD, ZEND_MUL etc) are going to be complicated
finding the right operand types combination and overflow handling.

Thanks. Dmitry.


>
> Best regards
>
> Anatol
>

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