Since Confluence version 5.6, comments are sent in the background with Ajax and there won't be any page reloads when comments are sent. Wouldn't it be nice if comments were also loaded asynchronously after the page has loaded? Imagine a very long list of comments. Right now, the page will take much longer to load, although the user might not even see the comments at first, because the contents of the page reach far beyond the bottom of his browser window.

This could be something like a simple "load comments with Ajax after DOMReady and show a progress bar in the meanwhile" or "only load comments when the comment section is visible in the user's browser window".

(Taken from: https://answers.atlassian.com/questions/332109/pushing-comments-to-clients-websockets-for-comments)