Why is my webpage slow?

Why is my webpage slow? Let's look at the code first. PHPcodeclassAdmin_ControllerextendsCI_Controller {publicfunction _ construct () {parent ::__ construct (); $ this-& gt; _ init_user (); why is my webpage slow?
Check the code first.

PHP code

  Class Admin_Controller extends CI_Controller {public function _ construct () {parent ::__ construct (); $ this-> _ init_user ();} // initialize user private function _ init_user () {if (! Empty ($ _ SESSION ['name']) {redirect ('manager');} else {redirect ('login ');}}

PHP code

  class Management extends Admin_Controller {    public function index()    {        $this->load->view('management');    }

PHP code

  class Login extends Admin_Controller {    public function index()    {        $this->load->view('login');    }        public function logins()    {        if($_POST['name'] == "admin" && $_POST['passwd'] == "123456")        {            $_SESSION['name'] = $_POST['name'];            redirect('management');        }        else        {            redirect('login');        }    }}

Now, the problem is that when I add $ this-> _ init_user () in the top-level constructor, the webpage is slow to refresh or log on. Why?

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Not yet.
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Is session_start () enabled? It is best to add an isset ($ _ SESSION ['name']).
Personal ignorance
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YSlow browser plug-in, analyze the web page, very detailed
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It's easy. your webpage is redirected cyclically.

When you have logged on to the management console, _ init_user redirects you to the management console.
When login is not logged on, it is redirected to login again.
So reciprocating
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Sequence problems.