There are many resources in your site and not whole resources in need all the time. By using this asynchronous settings, improve the performance and speed.
Long time tasks may cause unintentional rendering suspension or affect to its performance. To make pages faster, please check split task option.
Only necessary JS at loading
Process after load event
This will accelerate page’s load time. But this may cause compatibility issue since page still not be ready. It will be in ready state after document or window load event is ready. To fix this problem, Please add event handlers to window’s “alpha_complete” event.