Super-fast-loading websites

Many thanks for the simple explanation.

[off topic]
I now remember a post from @Black_Max about delaying rendering of the top menu/logo div and to ensure the SEO page content was called before the menu text.

His technique was:

  1. create a blank menu/logo placeholder at the top of the page
  2. store the actual menu/logo content just before </body>
  3. use position:fixed; top:0; left:0 fill in the reserved space.