Req #14263 [Opn->Wfx]: Don't free each allocation during shutdown
| From: | krakjoe@php.net | Date: | Tue, 17 Feb 2015 09:18:35 +0000 |
| Subject: | Req #14263 [Opn->Wfx]: Don't free each allocation during shutdown | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-190738@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=14263&edit=1
ID: 14263
Updated by: krakjoe@php.net
Reported by: samjam@php.net
Summary: Don't free each allocation during shutdown
-Status: Open
+Status: Wont fix
Type: Feature/Change Request
Package: CGI/CLI related
Operating System: *
PHP Version: *
Block user comment: N
Private report: N
New Comment:
This is simply not feasible today.
I can be wrong, but even so this kind of change would require an RFC.
I'm going to mark the bug as won't fix, this report can still be found by any future RFC.
Previous Comments:
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[2001-11-28 04:01:41] derick@php.net
Making it a feature request, as it's not a "bug".
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[2001-11-28 04:00:08] samjam@php.net
If compiled in standalone cgi mode, when the script exits, php only needs to free resources, not
other arrays or strings or items (unless we ever support object destructors).
It can take a LONG time to free a hundred thousand or so elements in nested arrays, 4 or 5 times
longer than it takes to create then.
See these threads in phpdev mailing list:
Re: [PHP-DEV] maybe serious error in RC3 memory manager
RE: [PHP-DEV] CGI quick cleanup
Sample code:
Note how long it takes to exit after finishing.
#! /usr/bin/php -q
<?php
ini_Set("max_execution_time","0");
ini_Set("memory_limit","500M");
class thingy {
function thingy($c) {
if ($c>0) $this->ref=&new thingy($c-1);
}
}
$stash=array();
$max=500000;
$start=time();
for($i=0;$i<$max;$i++) {
$r=rand(0,300);
$stash[$r][]=&new thingy(rand(0,10));
echo "\rUse: ".floor($i/$max*100)."% ";
}
echo "\n";
$mid=time();
$max=count($stash);
$c=0;
foreach(array_keys($stash) as $key) {
unset($stash[$key]);
$c++;
echo "\rFree: ".floor($c/$max*100)."% ";
}
unset($stash);
echo "\n";
$done=time();
print "Use: ".($mid-$start)."\n";
print "Free: ".($done-$mid)."\n";
?>
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Edit this bug report at https://bugs.php.net/bug.php?id=14263&edit=1