Hi,

Every time when we call

JLayoutHelper::render('path.tp.layout');

or real code from admin area

$layout = new JLayoutFile('joomla.toolbar.title');
$html   = $layout->render(array('title' => $title, 'icon' => $icon));

then JLayoutFile object running refreshIncludePaths method 3 times not depending from any condition:

• 2 times from constuctor
• once from JLayoutFile::getPaths(). If you look to refreshIncludePaths it is most heavy method in class.

As a result if we want to display just 4 lines of admin title

<h1 class="page-title">
    <span class="icon-<?php echo $icon; ?>"></span>
    <?php echo $displayData['title']; ?>
</h1>

we spend 3-5% of total time. In my server it is 4-5ms what is a lot. Sugest to rework this engine at the beginning and make more efficiant.