ID: 36672
Comment by: intersect at gmail dot com
Reported By: treehousetim at gmail dot com
Status: No Feedback
Bug Type: Scripting Engine problem
Operating System: Windows
PHP Version: 5.1.2
New Comment:
Exists on 5.2.4 on Linux.
Reproduce with the following code:
$ cat TestMem.php
<?php
$counter=0;
echo "Loop that does something..\n";
for($c=0;$c<1000000;$c++) {
if(MyFunc()) {
echo ".";
}
}
echo "\nLoop that does nothing..\n";
$counter=0;
for($c=0;$c<1000000;$c++) {
if(MyFunc()) {
}
}
function MyFunc() {
global $counter;
if(($counter % 100000) === 0) {
echo "$counter:" . memory_get_usage() . "\n";
}
$counter++;
return(false);
}
?>
Results:
$ php TestMem.php
Loop that does something..
0:58216
100000:58216
200000:58256
300000:58256
400000:58256
500000:58256
600000:58256
700000:58256
800000:58256
900000:58256
Loop that does nothing..
0:58256
100000:4058244
200000:8058244
300000:12058244
400000:16058244
500000:20058244
600000:24058244
700000:28058244
800000:32058244
900000:36058244
Note that memory leak results are identical if a 'slightly' non-empty
loop (ie: if($blah) { 1; } ) is included instead.
Leigh.
Previous Comments:
------------------------------------------------------------------------
[2006-03-17 01:00:05] php-bugs at lists dot php dot net
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
------------------------------------------------------------------------
[2006-03-09 20:44:14] [email protected]
Please try using this CVS snapshot:
http://snaps.php.net/php5.1-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php5.1-win32-latest.zip
Not reproducible on Linux.
------------------------------------------------------------------------
[2006-03-09 16:01:17] treehousetim at gmail dot com
Description:
------------
Empty if that calls a function that returns a value causes php to
consume huge amounts of memory (at least under windows)
This was tested using CLI
Reproduce code:
---------------
function testIt()
{
return true;
}
for ( $ix = 0; $ix < 200000; $ix++ )
{
echo "Jere is the Memory King $ix" . NL;
if ( testIt() )
{
}
}
Expected result:
----------------
php's memory usage to remain somewhat stable.
Actual result:
--------------
php's memory usage goes up at the rate of about one meg per second
while this script is running.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=36672&edit=1
