Description:
------------
Upgraded to php 5.3 and memory_get_usage reports significantly higher 
for php scripts memory usage both using command line and apache.

To rule out any issues with my code, I removed everything other than the 
call to memory_get_usage();

5.2 consistently reports 70-90k while php 5.3 consistently reports 600-
700k base memory usage for this one line script.  I tried this on mac os 
X and CENT OS/RHEL 5.3, same result.

To make certain it was not something about the way they were compiled I 
downloaded and compiled php 5.2 and 5.3 source from scratch with no 
compile options to make sure I am using the defaults and get the same 
results across several systems.


Reproduce code:
---------------
<?php
echo memory_get_usage();
?>

Expected result:
----------------
70-90k (88232) like PHP 5.2 had.

Actual result:
--------------
600-700k (630752) with php 5.3