"Moving the Javascript to the bottom" - wouldn't the best thing to do would be to invoke the JS from onLoad? And put the code in a separate minified JS file, so it can be cached?
Yes, but moving the actual script tag that loads that minified JS file to the bottom of the HTML can help in some situations. Less so now that most UAs have decent speculative parsers, but it used to be that seeing the script tag would block any resources below it from being requested until the script was done loading.
And being cached won't help for first-time visitors to the site, of course.
And being cached won't help for first-time visitors to the site, of course.