Description:
------------
strftime() called many times results in increasing memory usage. date() is OK. This is on Vista x64. PHP 5.1.6 (only version i have at the moment) on linux does not exhibit the same problem.

Reproduce code:
---------------
<?php

echo "=== strftime() ===\n";
echo "Start: ".memory_get_usage()."\n";
for($i = 0; $i < 10000; $i++ ) {
    strftime("%d");
}
echo "End: ".memory_get_usage()."\n\n";

echo "=== date() ===\n";
echo "Start: ".memory_get_usage()."\n";
for($i = 0; $i < 10000; $i++ ) {
    date("d");
}
echo "End: ".memory_get_usage()."\n";

?>

Expected result:
----------------
End memory usage for strftime() should be close to Start memory usage.

Actual result:
--------------
C:\php-gtk2>php andy\symftest\strftime.test.php
=== strftime() ===
Start: 54384
End: 119800

=== date() ===
Start: 119800
End: 119768

C:\php-gtk2>php -v
PHP 5.2.6 (cli) (built: May  2 2008 19:37:32)
Copyright (c) 1997-2008 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies

C:\php-gtk2>