Bug #6608 Updated: sizeof($array) extremly slow in loop. 90% cpu util
| From: | sniper@php.net | Date: | Thu, 10 May 2001 09:55:09 +0000 |
| Subject: | Bug #6608 Updated: sizeof($array) extremly slow in loop. 90% cpu util | ||
| Groups: | php.dev | ||
| Request: | Send a blank email to php-dev+get-54642@lists.php.net to get a copy of this message | ||
ID: 6608
Updated by: sniper
Reported By: mledet@spirenet.com
Old-Status: Feedback
Status: Closed
Bug Type: Performance problem
Operating system:
PHP Version: 4.0.2
Assigned To:
Comments:
No feedback. I problem exists with 4.0.5, reopen.
Previous Comments:
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[2001-04-10 10:12:23] sbergmann@php.net
Could you please test your script with either the PHP 4.0.4pl1 release, the latest PHP 4.0.5 RC or a
current CVS snapshot from http://snaps.php.net/? Thanks.
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[2000-09-07 13:01:24] mledet@spirenet.com
The following code performed well under 3.0.16.
for ($i=0; $i < sizeof($teacherarray); $i++) {
$a=$teacher_array[$i];
if ($a->teacher_id==$teacher_id) {
break;
}
}
However, under php 4.0.2 it is extrememly slow and causes cpu util for the httpd process to hit 90%.
$teacherarray is not being modified during the loop so the condition isn't changing.
BTW: Changing to the following code works ok.
$numteachers = sizeof($teacherarray);
for ($i=0; $i < $numteachers; $i++) {
$a=$teacher_array[$i];
if ($a->teacher_id==$teacher_id) {
break;
}
}
Either the sizeof function has had a serious decrease in its speed or something is awry..
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