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From: Yoann Padioleau <padator@wanadoo.fr>
To: Dario Teixeira <darioteixeira@yahoo.com>
Cc: Benedikt Meurer <benedikt.meurer@googlemail.com>,
	caml-list@yquem.inria.fr
Subject: Re: [Caml-list] OCamlJit 2.0
Date: Fri, 19 Nov 2010 12:20:01 -0800	[thread overview]
Message-ID: <023DB1B5-B4D6-4C2A-AAF6-2368F93BEBB6@wanadoo.fr> (raw)
In-Reply-To: <980786.74593.qm@web111507.mail.gq1.yahoo.com>


On Nov 19, 2010, at 11:46 AM, Dario Teixeira wrote:

> Hi,
> 
>> What would be really nice is to make a JIT for a language that really
>> need one, like PHP! There are lots of companies out there (Yahoo,
>> Facebook, wikimedia) that spend hundreds of millions of dollars on
>> machines that run PHP bytecode interpreters implemented by people who
>> are not Xavier Leroy.
> 
> Actually, Facebook has a compiler that transforms PHP source code into C++ [1],
> and they claim a 50% reduction in CPU usage.

Yes, which is good. But if you think about it is "only" a x2 speedup vs a
really slow bytecode interpreter (the Zend PHP interpreter). PHP is known
for being more than 30 times slower than C. 
It's even slower than Ruby on http://shootout.alioth.debian.org/u32/which-programming-languages-are-fastest.php
There are lots of opportunities to do better IMHO.

>  It's an interesting approach,
> though I suspect that even as we speak a new circle of hell is being warmed
> up

Oh yeah.

> especially for those who are enabling PHP's continued existence thanks
> to gimmicks such as this one...
> 
> Cheers,
> Dario Teixeira
> 
> [1] https://github.com/facebook/hiphop-php/wiki/
> 
> 
> 
> 




  reply	other threads:[~2010-11-19 20:20 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-11-16 14:52 Benedikt Meurer
2010-11-16 17:07 ` [Caml-list] " bluestorm
2010-11-16 17:32   ` Benedikt Meurer
2010-11-17  8:44 ` Native toplevel? (was: OCamlJit 2.0) Alain Frisch
2010-11-17 10:46   ` Satoshi Ogasawara
2010-11-17 11:38   ` Sylvain Le Gall
2010-11-17 22:57   ` [Caml-list] Native toplevel? Wojciech Daniel Meyer
2010-11-18 16:49   ` [Caml-list] Native toplevel? (was: OCamlJit 2.0) Ashish Agarwal
2010-11-19 18:09     ` David MENTRE
2010-11-19 18:24       ` Hezekiah M. Carty
2010-11-19 18:30         ` Ashish Agarwal
2010-11-19 18:42           ` Benedikt Meurer
2010-11-20 11:49     ` Jon Harrop
2010-11-18 18:19   ` Benedikt Meurer
     [not found]   ` <2025993285.616104.1290144569061.JavaMail.root@zmbs4.inria.fr>
2010-11-19 10:02     ` [Caml-list] Re: Native toplevel? Fabrice Le Fessant
2010-11-19 19:16       ` Benedikt Meurer
2010-11-19 18:43 ` [Caml-list] OCamlJit 2.0 Yoann Padioleau
2010-11-19 19:10   ` Benedikt Meurer
2010-11-20 15:59     ` Yoann Padioleau
2010-11-19 19:46   ` Dario Teixeira
2010-11-19 20:20     ` Yoann Padioleau [this message]
2010-11-20 15:19       ` [Was: OCamlJit 2.0] Vincent Balat
2010-11-20 15:42         ` [Caml-list] " Benedikt Meurer
2010-11-20 16:10           ` Yoann Padioleau
2010-11-20 16:25             ` Benedikt Meurer
2010-11-20 17:35               ` Yoann Padioleau
2010-11-20 17:08             ` Jon Harrop
2010-11-20 17:37               ` Yoann Padioleau
2010-11-20 17:48                 ` Sylvain Le Gall
2010-11-20 18:51                   ` [Caml-list] " Jon Harrop
2010-11-20 18:05                 ` [Caml-list] " Jon Harrop
2010-11-20 17:15             ` Gerd Stolpmann
2010-11-23  2:09             ` Elias Gabriel Amaral da Silva
2010-11-24  7:20     ` [Caml-list] OCamlJit 2.0 Alain Frisch
2010-11-24  7:59       ` Yoann Padioleau
2010-11-24  9:04       ` Compiling to Javascript Jerome Vouillon

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