#40002 [NEW]: Try/Catch performs poorly

From: public at syranide dot com Operating system: Windows XP 32bit PHP version: 5.2.0 PHP Bug Type: Performance problem Bug description: Try/Catch performs poorly Description: ------------ Try/Catch-statements in PHP is performing rather poorly, main problem that seems to be that the Catch-clauses are always tried regardless of an exception being thrown or not. Although Try/Catch is pretty expensive (about twice of @), the worst part is that it scales linear with each Catch. Of course that might be very hard to not do and is not a problem, but the problem arises from the linear scaling followed by Catch-clauses always impacting performance, regardless of an Exception being thrown or not. Reproduce code: --------------- $start = microtime(TRUE); class PHPException extends Exception {} for($i = 0; $i < 100000; $i++) { try {} catch(PHPException $e) {} catch(PHPException $e) {} catch(PHPException $e) {} catch(PHPException $e) {} catch(PHPException $e) {} } echo microtime(TRUE) - $start; Expected result: ---------------- Note that the above code is rather strupid in nature, but the result is the same regardless. From the above I would expect very similar performance to having only one Catch-clause (or to be more precise, that in the event of no exception being thrown performance is not linear to the number of Catch-clauses). Actual result: -------------- (nothing useful) -- Edit bug report at http://bugs.php.net/?id=40002&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=40002&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=40002&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=40002&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=40002&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=40002&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=40002&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=40002&r=needscript Try newer version: http://bugs.php.net/fix.php?id=40002&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=40002&r=support Expected behavior: http://bugs.php.net/fix.php?id=40002&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=40002&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=40002&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=40002&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40002&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=40002&r=dst IIS Stability: http://bugs.php.net/fix.php?id=40002&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=40002&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=40002&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=40002&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=40002&r=mysqlcfg