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Bug #63666 Poor date() performance [PATCH]
Submitted: 2012-12-02 00:50 UTC Modified: -
Votes:2
Avg. Score:3.5 ± 0.5
Reproduced:2 of 2 (100.0%)
Same Version:2 (100.0%)
Same OS:2 (100.0%)
From: njaguar at gmail dot com Assigned:
Status: Closed Package: Performance problem
PHP Version: 5.4.9 OS: any
Private report: No CVE-ID:
 [2012-12-02 00:50 UTC] njaguar at gmail dot com
Description:
------------
Full info here:
http://news.php.net/php.internals/64127

4.4.9 on old machine vs 5.4.9 on new machine:
date                    : 1.856 sec	date                    : 2.111 sec

after patch (~20% performance increase):
date: 1.763 sec

* new machine is 2 to 200x faster than old machine, see link above for more details


Test script:
---------------
// common date output format

// use any preferred timing methods either within php, or externally time execution of the script (eg, microtime(), etc) -- the former will be more accurate at isolating the date() function, overall
$c = 1000000;
for($i=0; $i<$c; $i++) date('F j, Y, g:i a', $now);


Expected result:
----------------
worse performance on stock builds, better when patch is applied -- still considerably slower than 4.4.9 version of date() and related, but is an improvement

Actual result:
--------------
By moving the frequently used iso fetching function into the switch statement, this prevents an otherwise unnecessary step for other more common usages of date formatting.

Patches

date.patch (last revision 2012-12-02 00:50 UTC) by njaguar at gmail dot com)

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Pull Requests

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2012-12-05 05:03 UTC] stas@php.net
Automatic comment on behalf of stas
Revision: http://git.php.net/?p=php-src.git;a=commit;h=fd650ec93e15bbbc05542e4acdde13d1fd9bcf73
Log: fix bug #63666 - Poor date() performance
 [2012-12-05 05:03 UTC] stas@php.net
-Status: Open +Status: Closed
 [2012-12-19 17:55 UTC] derick@php.net
Automatic comment on behalf of stas
Revision: http://git.php.net/?p=php-src.git;a=commit;h=fd650ec93e15bbbc05542e4acdde13d1fd9bcf73
Log: fix bug #63666 - Poor date() performance
 
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