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Bug #49345 Memory is not release
Submitted: 2009-08-24 13:50 UTC Modified: 2009-08-25 14:19 UTC
From: pearl1985 at interia dot pl Assigned:
Status: Not a bug Package: Performance problem
PHP Version: 5.3.0 OS: Windows XP x64
Private report: No CVE-ID: None
 [2009-08-24 13:50 UTC] pearl1985 at interia dot pl
When I was using function lambda in class, I saw that it is using a lot of operating memory. I saw this error when the script was sending e-mails reports to users registered in my service.

Reproduce code:
class example
	function test()
		$var = create_function('', '$a = 1;$b=2;$c=$a+$b;');
$example = new example;

echo 'Results after remove lambda'."\n";
echo 'Memory limit: '.ini_get('memory_limit')."\n";
echo 'Usage: '. round(memory_get_usage()/1024/1024, 1)."\n";
echo 'Peak:'. round(memory_get_peak_usage()/1024/1024, 1);
echo "\n";


Expected result:
I expected a slight growth of operating memory usage by script. By using endless loop, I expect the script will be executing even for 2 hours, thanks to correction of appropriate php configuration directive.

Actual result:
When I used endless loop while(true), php engine ended its work after 2 minutes,generating error "PHP Fatal error:  Allowed memory size of 41943040 bytes exhausted (tried to allocate 40961 bytes)"


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 [2009-08-24 14:28 UTC]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at and the instructions on how to report
a bug at

unset() does not free any memory.
 [2009-08-25 14:19 UTC] pearl1985 at interia dot pl
Ok, explain to me why, memory used by function create_function is not released after using function unset??
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