#39968 [NEW]: date() is extremely slow

[katzenmayer at erfnet dot de]

From: katzenmayer at erfnet dot de
Operating system: Debian Sarge
PHP version: 5.2.0
PHP Bug Type: Performance problem
Bug description: date() is extremely slow

Description:
------------
While switching a calendar script from PHP4 to PHP5 I noticed the script
takes multiple times as long to complete in PHP5 than it did in PHP4.

The problem seems to be date() and mktime() functions.

I did not notice any other PHP5 related performance issues. Scripts that
do not use date() or mktime() run very fast.

Reproduce code:
---------------
test.php:

<?
for ($i=0;$i<100000;$i++)
{
date('d');
}
?>

Now check this script with both PHP4 and PHP5:

time php4 test.php
time php5 test.php

Expected result:
----------------
The script should take about the same time in both PHP4 and PHP5

Actual result:
--------------
time php4 test.php

real 0m0.286s
user 0m0.034s
sys 0m0.252s

time php5 test.php

real 0m25.252s
user 0m18.579s
sys 0m5.615s


--
Edit bug report at [url]http://bugs.php.net/?id=39968&edit=1[/url]
--
Try a CVS snapshot (PHP 4.4): [url]http://bugs.php.net/fix.php?id=39968&r=trysnapshot44[/url]
Try a CVS snapshot (PHP 5.2): [url]http://bugs.php.net/fix.php?id=39968&r=trysnapshot52[/url]
Try a CVS snapshot (PHP 6.0): [url]http://bugs.php.net/fix.php?id=39968&r=trysnapshot60[/url]
Fixed in CVS: [url]http://bugs.php.net/fix.php?id=39968&r=fixedcvs[/url]
Fixed in release: [url]http://bugs.php.net/fix.php?id=39968&r=alreadyfixed[/url]
Need backtrace: [url]http://bugs.php.net/fix.php?id=39968&r=needtrace[/url]
Need Reproduce Script: [url]http://bugs.php.net/fix.php?id=39968&r=needscript[/url]
Try newer version: [url]http://bugs.php.net/fix.php?id=39968&r=oldversion[/url]
Not developer issue: [url]http://bugs.php.net/fix.php?id=39968&r=support[/url]
Expected behavior: [url]http://bugs.php.net/fix.php?id=39968&r=notwrong[/url]
Not enough info: [url]http://bugs.php.net/fix.php?id=39968&r=notenoughinfo[/url]
Submitted twice: [url]http://bugs.php.net/fix.php?id=39968&r=submittedtwice[/url]
register_globals: [url]http://bugs.php.net/fix.php?id=39968&r=globals[/url]
PHP 3 support discontinued: [url]http://bugs.php.net/fix.php?id=39968&r=php3[/url]
Daylight Savings: [url]http://bugs.php.net/fix.php?id=39968&r=dst[/url]
IIS Stability: [url]http://bugs.php.net/fix.php?id=39968&r=isapi[/url]
Install GNU Sed: [url]http://bugs.php.net/fix.php?id=39968&r=gnused[/url]
Floating point limitations: [url]http://bugs.php.net/fix.php?id=39968&r=float[/url]
No Zend Extensions: [url]http://bugs.php.net/fix.php?id=39968&r=nozend[/url]
MySQL Configuration Error: [url]http://bugs.php.net/fix.php?id=39968&r=mysqlcfg[/url]

[iliaa@php.net]

ID: 39968
Updated by: [email]iliaa@php.net[/email]
Reported By: katzenmayer at erfnet dot de
-Status: Open
+Status: Bogus
Bug Type: Performance problem
Operating System: Debian Sarge
PHP Version: 5.2.0
New Comment:

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
[url]http://www.php.net/manual/[/url] and the instructions on how to report
a bug at [url]http://bugs.php.net/how-to-report.php[/url]

You need to set the timezone, otherwise a notice is raised
which is what's killing the speed of your code.


Previous Comments:
------------------------------------------------------------------------

[2006-12-27 22:32:23] katzenmayer at erfnet dot de

Description:
------------
While switching a calendar script from PHP4 to PHP5 I noticed the
script takes multiple times as long to complete in PHP5 than it did in
PHP4.

The problem seems to be date() and mktime() functions.

I did not notice any other PHP5 related performance issues. Scripts
that do not use date() or mktime() run very fast.

Reproduce code:
---------------
test.php:

<?
for ($i=0;$i<100000;$i++)
{
date('d');
}
?>

Now check this script with both PHP4 and PHP5:

time php4 test.php
time php5 test.php

Expected result:
----------------
The script should take about the same time in both PHP4 and PHP5

Actual result:
--------------
time php4 test.php

real 0m0.286s
user 0m0.034s
sys 0m0.252s

time php5 test.php

real 0m25.252s
user 0m18.579s
sys 0m5.615s



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


--
Edit this bug report at [url]http://bugs.php.net/?id=39968&edit=1[/url]