Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:10168
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Message-ID: <40B843DA.3080403@leetspeak.org>
Date: Sat, 29 May 2004 10:03:38 +0200
User-Agent: Mozilla Thunderbird 0.6 (Windows/20040502)
MIME-Version: 1.0
To:  internals@lists.php.net
References: <40B76426.8080107@php.net> <40B7A984.6070702@actcom.net.il> <40B7B4EB.4080208@php.net> <40B82E44.2000409@actcom.net.il>
In-Reply-To: <40B82E44.2000409@actcom.net.il>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [PHP-DEV] switch labels in sub-blocks
From: cm@leetspeak.org (Michael Walter)

Ilya Sher wrote:
> Hartmut Holzgraefe wrote:
> 
>> Ilya Sher wrote:
>>
>>> It looks like using "goto" to me. Messy.
>>> That's probably the reason it is not allowed.
>>>
>>> Or maybe other people like myself failed to
>>> understand how it is really useful. Real example
>>> from you would help here.
>>
>>
>>
>> it's a valid performance trick in C
> 
> Thanks for the info.
> 
>>
>> http://www.jargon.net/jargonfile/d/Duffsdevice.html
>>
> I still fail to understand how that is useful.
> Please, explain me. _Real_ example is welcome.
It's an unrolled loop.

See http://www.lysator.liu.se/c/duffs-device.html for more information 
for more elaboration from the author (google works for you, too, btw).

Cheers,
Michael