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Bug #45409 strtotime() very slow when operating on timestamp
Submitted: 2008-07-01 20:55 UTC Modified: 2009-05-03 18:51 UTC
Votes:10
Avg. Score:5.0 ± 0.0
Reproduced:10 of 10 (100.0%)
Same Version:9 (90.0%)
Same OS:4 (40.0%)
From: jerico dot dev at gmail dot com Assigned: derick (profile)
Status: Closed Package: Date/time related
PHP Version: 5.*, 6CVS (2008-12-09) OS: *
Private report: No CVE-ID: None
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 [2008-07-01 20:55 UTC] jerico dot dev at gmail dot com 
Description:
------------
strtotime() performs 3 orders of magnitude slower when operating on a timestamp.

Reproduce code:
---------------
$string = '1902-03-25 18:25:25';
$timestamp = strtotime($string); 

$mt0 = microtime(true);
$result1 = strtotime("$string +1 year");
$mt1 = microtime(true);
$result2 = strtotime("+1 year", $timestamp);
$mt2 = microtime(true);
printf("%.6f\r\n%.6f\r\n", $mt1-$mt0, $mt2-$mt1);

// This will output
// 0.000171
// 0.721877
// on my machine

Actual result:
--------------
see reproduce code

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 [2008-07-01 21:30 UTC] derick@php.net 
I'll have a look at this, but there is even a MUCH faster way:

<?php
$d = new DateTime( '1902-03-25 18:25:25' );
$mt0 = microtime(true);

$d->modify( '+1 year' );
$mt1 = microtime(true);
$d->modify( '+1 year' );
$mt2 = microtime(true);
printf("%.6f\r\n%.6f\r\n", $mt1-$mt0, $mt2-$mt1);
?>
0.013312/0.696215 for your code, vs 0.000065/0.000028 for my approach.
 [2009-02-04 13:47 UTC] php at wallbash dot com 
Hi,

i hope i don't bug you but do you know when this might get fixed or is there a patch available ? We (finally) moved to 5.2 and this is a showstopper for us and would (sadly) require lots of refactoring.

Thanks
 [2009-05-03 18:51 UTC] derick@php.net 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.

This seems to be a duplicate of bug #48522, which is now fixed in CVS. 
I now get the following result with your original code.

0.000047
0.000079
 
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