WordPress/wp-admin/admin-footer.php

<p id="footer"><a href="http://wordpress.org/">WordPress</a></strong> <?php bloginfo('version'); ?> &#8212; <a href="http://wordpress.org/support/"><?php _e('Support Forums'); ?></a><br />
<?php
     printf(__('%s seconds'), number_format(timer_stop(), 2));
?>
</p>

</body>
</html>