note 114322 added to function.function-exists
| From: | b dot g dot dariush at gmail dot com | Date: | Fri, 07 Feb 2014 05:50:25 +0000 |
| Subject: | note 114322 added to function.function-exists | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-198429@lists.php.net to get a copy of this message | ||
function_exists() does not cache its query internally.
by executing the following code
$funcs = \array_shift(\get_defined_functions());
$l = new \core\utiles\loadTime;
$times = 0;
$l->start();
for($index = 0; $index<count($funcs); $index++)
{
foreach($funcs as $func)
{
$times++;
if(\function_exists($func)) ;
}
}
$s = $l->stop();
echo "<span style='color:green'>$times</span> took : $s";
# the output would be
$> 2365444 took : 0.70324
By executing the
$funcs = \array_shift(\get_defined_functions());
$l = new \core\utiles\loadTime;
$times = 0;
$l->start();
static $func_check = array();
for($index = 0; $index<count($funcs); $index++)
{
foreach($funcs as $func)
{
$times++;
if(!isset($func_check[$func]))
{
if(\function_exists($func)) ;
$func_check[$func] = 1;
}
else $func_check[$func];
}
}
$s = $l->stop();
echo "<span style='color:green'>$times</span> took : $s";
# the output would be
$> 2365444 took : 0.53446
There is a 0.16878 seconds improvement, when you use static array to cache methods existence.
----
Server IP: 72.52.91.14
Probable Submitter: 72.52.91.14
----
Manual Page -- http://php.net/manual/en/function.function-exists.php
Edit -- https://master.php.net/note/edit/114322
Del: integrated -- https://master.php.net/note/delete/114322/integrated
Del: useless -- https://master.php.net/note/delete/114322/useless
Del: bad code -- https://master.php.net/note/delete/114322/bad+code
Del: spam -- https://master.php.net/note/delete/114322/spam
Del: non-english -- https://master.php.net/note/delete/114322/non-english
Del: in docs -- https://master.php.net/note/delete/114322/in+docs
Del: other reasons-- https://master.php.net/note/delete/114322
Reject -- https://master.php.net/note/reject/114322
Search -- https://master.php.net/manage/user-notes.php