Re: Re: drastic memory consumption with a sequenceof exceptions

From: Date: Wed, 10 Aug 2005 09:54:33 +0000
Subject: Re: Re: drastic memory consumption with a sequenceof exceptions
References: 1 2 3 4 5  Groups: php.internals 
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You're right, using that file to create a big piece of data was just for demonstration purposes. In my personal case it's XML parsing. The way I read what you just said is that this is behavior by design. But if I don't throw Exceptions, memory usage stays constant. Throwing and catching these exceptions are the exception-to-the-rule. Nonetheless, if this is truly by design.. maybe that's something to look into for PHP6. Ron "Marcus Boerger" <helly@php.net> schreef in bericht news:124244453.20050810114522@marcus-boerger.de... > Hello Ron, > > Wednesday, August 10, 2005, 8:47:25 AM, you wrote: > > > Okay Andi, the script in this message is as simple as it gets. I used a > > syslog file to create a load of data in this case, but of course you can use > > any (text) file for this. > > > #!/usr/bin/php5 > > <? > > function process() > > { > > $data = file("/var/log/syslog.0"); > > > foreach ($data as $line) > > throw new Exception("error"); > > What makes you think the file would be closed. Erm the array deleted? And > that is your problem you are unnecessarily reading all the file into an > array. Try using the same with FileObject instead, which should reduce > memory usage a lot: > > foreach(FileObject($file) as $data) throw new Exception("error"); > > But of course you only did that to demonstrate the memory problem which in > fact simply means that we don't do a full stack cleanup like c++ would do > here (php != c++). > > In php we do the cleanup at script termination. That is also the reason > why php is not perfectly suitable for console apps especially when it comes > to daemons. > > best regards > marcus

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