From: itay dot malimovka at gmail dot com
Operating system: Linux and Windows
PHP version: 5.2.6
PHP Bug Type: Performance problem
Bug description: 45 times slower execution of PHP code snipet than with asp.net
Description:
------------
the following code is run ~45 times slower compared to a similar C# code.
I run the test on several machines (32 & 64, Windows and Linux-on linux
only the PHP).
Notice in the example below I give both PHP and C# codes I used.
Reproduce code:
---------------
//PHP
//----------------------------------------------------------------------------------------------------------------
<?php
set_time_limit(0);
$start=time();
$arr = array(1,2,3,4,5,6,7,8,9,0);
$x = 8;
for ($i=0;$i<94707441;$i++)
{
$x = $arr[$i%10];
$y = $arr[$i%7];
if ($x == $y)
{
$total += $x*$y;
//$words .= ','.$x;
}
}
echo $total."<Br>";
echo "total time : ".(time()-$start);
?>
//C#
//----------------------------------------------------------------------------------------------------------------
int startTime = Environment.TickCount;
int[] arr;
arr = new int[10] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
int x = 8;
int y=0;
int total=0;
for (int i = 0; i < 94707441; i++)
{
x = arr[i%10];
y = arr[i%7];
if(x == y)
total+=x*y;
}
Response.Write(total+"<br>");
int endTime = Environment.TickCount;
double executionTime = (double)(endTime - startTime) / 1000.0;
Response.Write("Page Execution time is " + executionTime + " seconds.");
Expected result:
----------------
at least execution time should be the same.
Actual result:
--------------
php runs much much slower X45 that asp.net
--
Edit bug report at http://bugs.php.net/?id=45247&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=45247&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=45247&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=45247&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=45247&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=45247&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=45247&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=45247&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=45247&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=45247&r=support
Expected behavior: http://bugs.php.net/fix.php?id=45247&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=45247&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=45247&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=45247&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45247&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=45247&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=45247&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=45247&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=45247&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=45247&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=45247&r=mysqlcfg
