Lifecycle is a utility component which displays the execution time of each JSF phase.
It also synchronizes automatically after each AJAX request.
<h:form>
<p:commandButton value="Dummy Ajax Request" update="@none" />
<h:commandButton value="Dummy Ajax Request">
<f:ajax render="@none" />
</h:commandButton>
<br />
<br />
<p:lifecycle/>
</h:form>