ID: 33595
Comment by: marek at lewczuk dot com
Reported By: rodricg at sellingsource dot com
Status: Assigned
Bug Type: Class/Object related
Operating System: *
PHP Version: 6CVS-2005-08-02
Assigned To: dmitry
New Comment:
The bug still exists in 5.1.1. If this cannot be solved in near future
then I think it should be noted somewhere in the manual.
Previous Comments:
------------------------------------------------------------------------
[2005-08-01 11:00:32] [EMAIL PROTECTED]
Yes. This is different bug. However it is not very critical (as bug
#33487 too), because all memory is freed on request shutdown.
I don't know how to implement support for circular data structures
freeing without significant performance lose.
------------------------------------------------------------------------
[2005-07-07 03:49:52] rodricg at sellingsource dot com
Distinctly different than bug #33487 this only occurs when the object
contains a recursive reference. Add
echo number_format(memory_get_usage());
to the end of the script and you get 346,360,656. Then comment out
$this->parent = $parent and run again to get 53,832. I suspect the
internal reference is not properly invalidated upon the destruction of
class A. This would keep the ref count > 0 and foil garbage
collection. Unless I am missing something....
------------------------------------------------------------------------
[2005-07-06 23:44:25] rodricg at sellingsource dot com
Description:
------------
Objects with recursive references leak memory.
PHP 5.1.0b2 exhibits the same behavior.
Reproduce code:
---------------
<?php
class A {
function __construct () {
$this->b = new B($this);
}
}
class B {
function __construct ($parent = NULL) {
$this->parent = $parent;
}
}
for ($i = 0 ; $i < 1000000 ; $i++) {
$a = new A();
}
?>
Expected result:
----------------
Memory usage should remain constant.
Actual result:
--------------
Memory usage quickly increases to consume several hundred
megabytes.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=33595&edit=1
