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)