Otimizar o site com jQuery no Google

<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js'></script>
<script src='https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.min.js'></script>

Fonte:  https://developers.google.com/speed/libraries/devguide