#50794 [NEW]: memory_get_usage() reports higher in php 5.3

From: paulsidekick at gmail dot com Operating system: *nix PHP version: 5.3.1 PHP Bug Type: Performance problem Bug description: memory_get_usage() reports higher in php 5.3 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 -- Edit bug report at http://bugs.php.net/?id=50794&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=50794&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=50794&r=trysnapshot53 Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=50794&r=trysnapshot60 Fixed in SVN: http://bugs.php.net/fix.php?id=50794&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=50794&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=50794&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=50794&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=50794&r=needscript Try newer version: http://bugs.php.net/fix.php?id=50794&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=50794&r=support Expected behavior: http://bugs.php.net/fix.php?id=50794&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=50794&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=50794&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=50794&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=50794&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=50794&r=dst IIS Stability: http://bugs.php.net/fix.php?id=50794&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=50794&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=50794&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=50794&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=50794&r=mysqlcfg