ID: 49996 User updated by: dor at videocells dot com Reported By: dor at videocells dot com -Status: Feedback +Status: Open Bug Type: Performance problem Operating System: Centos 5.2 64 bit PHP Version: 5.3.0 New Comment:
I have two exact computers in terms of OS installation and apache/php configuration (except the php 5.3 against php 5.2.9) the average speed this function takes to run in php 5.2.9 is : float(0.015974044799805) float(0.0457763671875) float(0.045061111450195) float(0.65398216247559) float(0.92506408691406) float(0.70810317993164) float(0.19216537475586) float(0.32210350036621) float(0.73885917663574) float(0.16283988952637) float(0.94914436340332) float(0.62394142150879) float(0.25200843811035).... while on php 5.3 its : float(63.025951385498) float(62.762022018433) float(62.709093093872) float(63.004970550537) float(63.482046127319) float(63.012838363647) float(62.775135040283) float(62.896966934204) float(63.131093978882) float(63.91716003418) float(63.18211555481) .... its 60 times slower. can i somehow send a print screen, or attach the printouts of both computer's phpinfo() ? Previous Comments: ------------------------------------------------------------------------ [2009-10-27 22:27:17] [email protected] With this simplified and working (!) script I get exactly same results with PHP_5_2, PHP_5_3 and HEAD of today: <?php $timezoneArray = array ( "(GMT -12:00) International Date Line West" => "Etc/GMT+12", "(GMT -11:00) Midway Island, Samoa" => "Pacific/Midway", "(GMT -10:00) Hawaii" => "US/Hawaii", // many many more time zones... "(GMT +12:00) Auckland, Wellington" => "Pacific/Auckland", "(GMT +12:00) Fiji, Kamchatka, Marshall Is." => "Asia/Kamchatka", "(GMT +13:00) Nuku'alofa" => "Pacific/Tongatapu"); foreach ($timezoneArray as $TimezoneDescription => $TimezoneID) { $res = timezone_open($TimezoneID); if($res) { $start = microtime(true); $trans = $res->getTransitions(); $end = microtime(true); var_dump(1000 * ($end - $start)); } } ?> Now, where is the performance issue here? ------------------------------------------------------------------------ [2009-10-27 06:55:10] dor at videocells dot com <?php $timezoneArray = array ( "(GMT -12:00) International Date Line West" => "Etc/GMT+12", "(GMT -11:00) Midway Island, Samoa" => "Pacific/Midway", "(GMT -10:00) Hawaii" => "US/Hawaii", // many many more time zones... "(GMT +12:00) Auckland, Wellington" => "Pacific/Auckland", "(GMT +12:00) Fiji, Kamchatka, Marshall Is." => "Asia/Kamchatka", "(GMT +13:00) Nuku'alofa" => "Pacific/Tongatapu"); foreach ($timezoneArray as $TimezoneDescription => $TimezoneID) { $res = timezone_open($TimezoneID) if($res) { $TimeInTimezone = new DateTime ("now",$res) $microParts = explode(" ",microtime()); list($a,$b) = explode(".",$microParts[0]); echo "before : ".strftime('%Y%m%d-%H%M%S',time()).".".$b; //the following line takes alot of time : $trans = $res->getTransitions(); $microParts_2 = explode(" ",microtime()); list($c,$d) = explode(".",$microParts_2[0]); echo "before : ".strftime('%Y%m%d-%H%M%S',time()).".".$d; } } ------------------------------------------------------------------------ [2009-10-26 22:49:11] [email protected] Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. And preferrably such which does not have several syntax errors and missing parts.. ------------------------------------------------------------------------ [2009-10-26 13:16:58] dor at videocells dot com Description: ------------ Hi, it seems to me that the DateTimeZone::getTransitions() function suffered a performance loss of some degree between php 5.2.9 and 5.3 each call to it takes about one tenth of a second. I noticed this because I happen to have a function that recieves many timezones and checks the transistions of each of them. Recently I discovered a performance loss on my web gui, and after some research i found out that for some reason the getTransitions() function takes a noticable amount of time to run. much more than with php 5.2.9 for the same request to complete. note that since we worked with previous versions of php, it is called without the new parameters added in php 5.3 Reproduce code: --------------- $TimezonesToAdd = array ( "(GMT -12:00) International Date Line West" => "Etc/GMT+12", "(GMT -11:00) Midway Island, Samoa" => "Pacific/Midway", "(GMT -10:00) Hawaii" => "US/Hawaii", // many many more time zones... "(GMT +12:00) Auckland, Wellington" => "Pacific/Auckland", "(GMT +12:00) Fiji, Kamchatka, Marshall Is." => "Asia/Kamchatka", "(GMT +13:00) Nuku'alofa" => "Pacific/Tongatapu"); foreach ($TimezonesToAdd as $TimezoneDescription => $TimezoneID) { EnsureTimezoneExists ($TimezoneID); self::$_AvailableTimezones [$TimezoneID] = $TimezoneDescription; } function EnsureTimezoneExists($TimezoneID) { $res = timezone_open($TimezoneID) if($res) { $TimeInTimezone = new DateTime ("now",$res) //the following line takes alot of time : $trans = $res->getTransitions(); } } Expected result: ---------------- The $res->getTransitions() call should cost in the magnitude of 0.001 seconds, but instead it takes about 0.1 seconds, which is noticable. Actual result: -------------- microtime() calls before and after the function call, show that the function takes about 0.1 seconds to run ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=49996&edit=1
