Async tag is used to improve page load time.
It creates an empty HTML element, and after the page has loaded, a little script makes an asynchronous request to the server to render the template. This approach is also known as "lazy loading".
A list of a thousand posts typically takes a few seconds to finish loading.
<Loop type=post count=1000> <Field title /> </Loop>
Wrap the above template with the
<Async> ... </Async>
The page will load immediately, then it gets the content from the server.
There are some disadvantages to this approach.
Page layout can shift around as the content is being loaded.
Some search engines might not be able to index the content.
Currently, modules that require additional script files (such as pagination, slider, form, and dynamic table) are not supported. Work is in progress on a module loader to solve this.