#34700 [Opn->Fbk]: performance problem with date()

From: Date: Sat, 01 Oct 2005 15:07:22 +0000
Subject: #34700 [Opn->Fbk]: performance problem with date()
References: 1  Groups: php.bugs 
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 ID:               34700
 Updated by:       sniper@php.net
 Reported By:      six at aegis-corp dot org
-Status:           Open
+Status:           Feedback
 Bug Type:         Date/time related
 Operating System: linux 2.4
 PHP Version:      5.1.0RC1
 New Comment:

Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip




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

[2005-10-01 16:07:27] six at aegis-corp dot org

Description:
------------
performance of the date() function has taken a huge hit between PHP 5.0
and 5.1. i believe this is because of an unneeded syscall when a second
argument is given.

Reproduce code:
---------------
<?

for ($a = 0; $a < 100000; $a++) date("Y-m-d H:i:s", $a);

?>

Expected result:
----------------
time /usr/local/bin/php-cli-5.0.4 datetest.php    
real 0m2.022s
user 0m1.910s
sys  0m0.000s

Actual result:
--------------
time /usr/local/bin/php-cli-5.1.0RC1 datetest.php 
real 0m10.001s
user 0m8.120s
sys  0m0.130s

5.1.0 takes more than 4x the time to complete than 5.0.4

with an strace, I can see that 5.1.0RC1 makes one (probably unneeded)
time() syscall per call to date(), which 5.0.4 does not


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


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