From: xl269 at cam dot ac dot uk
Operating system: debian gnu/linux lenny
PHP version: 5.3CVS-2008-09-26 (CVS)
PHP Bug Type: Performance problem
Bug description: memory leak on unset(array)
Description:
------------
unset(array) doesn't free up all the memory. or perhaps setting elements
in an array is using up memory that can't be freed. whatever, I dunno how
Zend works.
basically, bug 41713 isn't actually fixed.
also it'd be helpful if someone explains why unset() seems to use up ~200B
of memory regardless. in a CLI daemon that's a significant memory leak.
Reproduce code:
---------------
<?php
define('LF', chr(10));
$a = null;
echo memory_get_usage().LF;
$a = str_repeat("test", 65536);
echo memory_get_usage().LF;
unset($a);
echo memory_get_usage().LF;
for ($i=0; $i<65536; $i++) { $a[] = "test"; }
echo memory_get_usage().LF;
unset($a);
echo memory_get_usage().LF;
?>
Expected result:
----------------
627560
889944
627776
12163304
62xxxx
Actual result:
--------------
627560
889944
627776
12163304
888744
--
Edit bug report at http://bugs.php.net/?id=46180&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=46180&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=46180&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=46180&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=46180&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=46180&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=46180&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=46180&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=46180&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=46180&r=support
Expected behavior: http://bugs.php.net/fix.php?id=46180&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=46180&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=46180&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=46180&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46180&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46180&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=46180&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=46180&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=46180&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=46180&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=46180&r=mysqlcfg
