Hvorfor loader min side så langsomt

er der nogen der kan gennemskue hvorfor denne kode skal bruge 10-15sekunder til at loade..??

<?php

function get_microtime()
{
    list($usec, $sec) = explode(" ", microtime());
    return ((float)$usec + (float)$sec);
}

function calc_microtime($from = 0)
{
    return get_microtime() - $from;
}

$t_generated = calc_microtime();

error_reporting(E_ALL);

class TimeCalculator {

    var $start_time;
    var $caption;
   
    function TimeCalculator($caption) {
        $this->start_time = microtime();
        $this->caption = $caption;   
    }
   
    function getElapsedTime() {
        $end_time = microtime();
        $elapsed_time = round($this->getFloatTime($end_time) - $this->getFloatTime($this->start_time), 3);
        echo "<b>{$this->caption}</b> was executed in <b>$elapsed_time</b> seconds <br>\r\n";
    }
   
    function getFloatTime($time_str) {
        list($usec, $sec) = explode(" ", $time_str);
        return ((float)$usec + (float)$sec);       
    }
   
}

define ('PATH_TO_SYSTEM_CLASS','system/core/System.php');

//////////////////////////////////////////////////////////////////
//
//        start of the script actions
//
//////////////////////////////////////////////////////////////////


require_once(PATH_TO_SYSTEM_CLASS);

//if (file_exists('system/user-config/LocalSettings.php')) echo "file exists"; else "not";

System::loadSystemSettings ('system/user-config/DefaultSettings.php');
System::loadSystemSettings ('system/user-config/LocalSettings.php');

require_once('admin/lang/'. System::getSystemSettings ('LOCALE') .'.php');//&#512;&#1035;R&#704;

if (is_null(System::getSystemSettings('SITE_URL')))
{
    header("Location: install.php");
    exit;
}
elseif (is_readable ("install.php"))
{
    echo '<p>Your installation is temporarily disabled because the install.php file in the root of your'
    .' installation is still readable.<br> To proceed, please remove the file or change its mode to make'
    .' it non-readable for the Apache server process and refresh this page.</p>';
    exit;
}

System::boot();
System::init();

 
header("Content-type:text/html;charset=utf-8");

if (Navigator::isRequestedUnderLegalURI()){

    $uri = Navigator::getUri();

    //$page_config = new PageConfig($uri);

    $page_config = PageConfig::getPageConfig ($uri);

    // the Responder!!!

    if ($page_config->PageExists()){

        $page_content = System::getPage($page_config);
       
        $time_generated = calc_microtime($t_generated);
       
        setcookie('time_generated', sprintf('%.3f', $time_generated));
       
        echo $page_content;

        }
    elseif ($page_config->isADirecotryRequestedWithoutASlashAtTheEnd()){

        header($_SERVER['SERVER_PROTOCOL'] . ' 301 Moved Permanently');// no such page in configuration
        header("Location: {$_SERVER['REQUEST_URI']}/");
        echo "The requested resource is located under a different URL: {$_SERVER['REQUEST_URI']}/";

        }
    elseif (System::doesParentUserPageExist($uri)) {
       
        $parent_uri = System::getUserPageParentURI($uri);
        $page_config = PageConfig::getPageConfig ($parent_uri);
       
        $passed_parameters_via_uri = substr($uri, strlen($parent_uri));
       
        $_REQUEST['passed_parameters_via_uri'] = $passed_parameters_via_uri;
       
        $page_content = System::getPage($page_config);
        echo $page_content;
       
    }
    else{ // the 404 error case!

        header($_SERVER['SERVER_PROTOCOL'] . ' 404 Not Found');// no such page in configuration
        echo "404 Not Found";

        }
    }
else{

        header($_SERVER['SERVER_PROTOCOL'] . ' 403 Forbidden');// not configured to answer such request
        echo "The software is not configured to respond to requests of the following host: {$_SERVER['HTTP_HOST']}\n";


    }

?>