Edit report at http://bugs.php.net/bug.php?id=53294&edit=1
ID: 53294
Updated by: der...@php.net
Reported by: maarten at react dot com
Summary: DateTime->setTimezone() very slow far future dates
-Status: Open
+Status: Assigned
Type: Bug
Package: Date/time related
Operating System: 64 bit Centos
PHP Version: 5.2.14
-Assigned To:
+Assigned To: derick
Block user comment: N
Previous Comments:
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[2010-11-11 13:55:30] maarten at react dot com
Description:
------------
DateTime->setTimezone() is very slow on dates in the far future (or
history), and the time needed isnt monotonic for greater dates.
ie. setTimezone() on a DateTime(PHP_INT_MAX) /* 64 bit max */ takes 0.05
seconds, but takes 250 whole seconds for PHP_INT_MAX/2 .
Using the $timezone parameter of the DateTime constructor is always fast
though.
Test script:
---------------
$start = microtime(1);
$date = new DateTime('@'.(PHP_INT_MAX));
// $date = new DateTime('@'.(int)(PHP_INT_MAX / 2));
$date->setTimezone(new DateTimeZone('Europe/Amsterdam'));
echo microtime(1) - $start;
Expected result:
----------------
A faster change of the timezone; performance equal to using the
constructor parameter
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Edit this bug report at http://bugs.php.net/bug.php?id=53294&edit=1
