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Subject: require_once
From: dletz@blog.de ("dletz@blog.de")

Hello everyone,

when testing speed of includes and requires i found that "require_once" =
 =

seems to be very slow in comparison to "require". Even worse  =

"require_once" seems to be slower than a php function "myrequire_once". =
 =

This is true not only for cli but also when using apc or eAccelerator.  =

Does anyone has an explanation for this?

Testcode:
<?
$start_time =3D microtime(true);

function myrequire_once($file)
{
     static $loaded =3D array();
     if (!array_key_exists($file, $loaded))
     {
         $loaded[$file] =3D 1;
         require $file;
     }
}

for ($i=3D0;$i<1000;$i++) {
     require_once('manyClasses/'.$i.'.class.php');
     //myrequire_once('manyClasses/'.$i.'.class.php');
}

$execution_time =3D microtime(true) - $start_time;
echo number_format($execution_time,4)."\n";
?>

I first generated the classes in manyClasses with this generation code  =

(you have to create the directory manyClasses first):

<?
$template =3D '<?
class A%s
{
     private $B%s =3D "%s";
     function C%s($arg1, $arg2)
     {
         if (rand() > 1000)
             return $arg1 + $arg2;
         else
             return 0;
     }
};
?>';

for($i=3D0; $i< 1000; $i++)
{
     $rand =3D rand();
     $file =3D sprintf($template, md5($rand), md5($rand+1), md5($rand+2)=
,  =

md5($rand+3));
     file_put_contents('manyClasses/'.$i.'.class.php', $file);
}
?>


Faithfully
Dominic Letz