ID: 40970
Updated by: [EMAIL PROTECTED]
Reported By: php at edwardk dot info
Status: Bogus
Bug Type: Performance problem
Operating System: Windows 2003
PHP Version: 5.2.1
New Comment:
Might be related to stat cache usage... Try to see if you see the
difference stat'ing a set of files in random order, not the same file
repeatedly.
Previous Comments:
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[2007-04-01 20:42:47] php at edwardk dot info
I have modified the code to use, $blah = stat('.htaccess');
This file does exist, it is 161 bytes on NTFS.
PHP 4.4.6: 1.641ms
PHP 5.1.2: 108.29ms
Normally, I would be using the commands on many small files (400ish) in
the current folder to determine if any of them had changed. This was
fast enough on PHP4, but on PHP5, the same code takes much longer.
------------------------------------------------------------------------
[2007-04-01 14:44:02] [EMAIL PROTECTED]
This is only the case when stat() fails.
If you change stat('.'); to stat('<some file>'); you will se that PHP5
is faster than php4. Almost 2x.
------------------------------------------------------------------------
[2007-04-01 00:16:16] php at edwardk dot info
Description:
------------
filemtime and other related functions are slower on php5 vs php4
Using PHP 5.2.1 and PHP 4.4.6 on Athlon X2 3800+, Windows 2003
the speed difference is about 50-100x slower.
Reproduce code:
---------------
<?
header('Content-type: text/plain');
function microtime_float()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
$time_start = microtime_float();
for ($i = 1; $i <= 1000; $i++) {
$blah = stat('.');
}
$time_end = microtime_float();
$time = $time_end - $time_start;
echo 'Took '.round(($time*100),3).'ms';
?>
Expected result:
----------------
Speeds should be similar
Actual result:
--------------
On PHP 4.4.6, it took about 1.6ms
On PHP 5.2.1 it took about 130ms
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Edit this bug report at http://bugs.php.net/?id=40970&edit=1
