Bug #64084 [Opn->Wfx]: Using exceptions is much slower than using function-approach

[rasmus]

Edit report at https://bugs.php.net/bug.php?id=64084&edit=1

 ID:                 64084
 Updated by:         ras...@php.net
 Reported by:        narasius at gmail dot com
 Summary:            Using exceptions is much slower than using
                     function-approach
-Status:             Open
+Status:             Wont fix
 Type:               Bug
 Package:            Performance problem
 Operating System:   Linux
 PHP Version:        5.4.11
 Block user comment: N
 Private report:     N

 New Comment:

Yup, exceptions are not super fast. But assuming you are not using exceptions 
for 
flow-control and they only happen in really exceptional cases, it shouldn't be 
an 
issue.


Previous Comments:
------------------------------------------------------------------------
[2013-01-27 12:17:42] narasius at gmail dot com

Description:
------------
In speed-sensible application this issue might affect the efficiancy. It 
appears that using an exception to report some error is at least 10 times 
slower (with recursion of 3) that using old-fashioned function-approach.

For test-script below timing for using exception is 2.962 seconds, for using 
function-approach timing is 0.336 seconds.

Test script:
---------------
<?php

    function exceptionf1()
    {
        throw new Exception( 'msg' ) ;
    }
    function exceptionf2()
    {
        exceptionf1() ;
    }
    function exceptionf3()
    {
        exceptionf2() ;
    }


    function returnfunction1( &$error_msg )
    {
        $error_msg = 'msg' ;
        return false ;
    }

    function returnfunction2( &$error_msg )
    {
        return returnfunction1( $error_msg ) ;
    }

    function returnfunction3( &$error_msg )
    {
        return returnfunction2( $error_msg ) ;
    }




    $t1 = microtime( true ) ;
    for ( $i = 0 ; $i < 1000000 ; $i++ ) {
        $success = true ;
        try {
            exceptionf3() ;
        } catch ( Exception $e ) {
            $success = false ;
            $error_msg = $e->getMessage() ;
        }
    }
    $d = microtime( true ) - $t1 ;

    print "d=$d\n" ;





    $t1 = microtime( true ) ;
    for ( $i = 0 ; $i < 1000000 ; $i++ ) {
        $success = returnfunction3( $error_msg ) ;
    }
    $d = microtime( true ) - $t1 ;
    print "d=$d\n" ;




------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=64084&edit=1