function perform($path)
 {
     $runner = new lmbTestRunner();
     $runner->setReporter($this->_getReporter());
     $runner->run($this->root_node, $path);
     if (isset($_GET['back'])) {
         $postfix = '';
     } else {
         $postfix = '/..';
     }
     echo '<small>' . $runner->getRunTime() . '</small>';
     echo '<p>' . $this->_createBrowseLink($path . $postfix, 'Back') . '</p>';
 }