#39879 [Opn->Bgs]: strval not optimized
| From: | tony2001@php.net | Date: | Tue, 19 Dec 2006 09:28:51 +0000 |
| Subject: | #39879 [Opn->Bgs]: strval not optimized | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-106539@lists.php.net to get a copy of this message | ||
ID: 39879
Updated by: tony2001@php.net
Reported By: roberto at spadim dot com dot br
-Status: Open
+Status: Bogus
Bug Type: Performance problem
Operating System: ALL
PHP Version: 5.2.0
New Comment:
That's because you're comparing apples to oranges.
Internal function has to copy the passed parameter, while userspace
function may use copy-on-write, avoiding the malloc-memcpy-free cycle
on each iteration.
Previous Comments:
------------------------------------------------------------------------
[2006-12-18 22:03:39] roberto at spadim dot com dot br
Description:
------------
maybe strval isn't otimized
see reproduce code
Reproduce code:
---------------
<?php
function ret($st){return($st);}
$qnt=1000000;
$str=str_repeat("ae",1000);
$st1=microtime(1);
for ($i=0;$i<$qnt;$i++)
ret($str);
echo (microtime(1)-$st1)."\n";
$st1=microtime(1);
for ($i=0;$i<$qnt;$i++)
strval($str);
echo (microtime(1)-$st1)."\n\n";
?>
Expected result:
----------------
expect to result 2
be small than result 1
Actual result:
--------------
result 1 is bigger than 2
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=39879&edit=1