Making the world’s fastest website, and other mistakes

Worth remembering:

HTTP/1.1 204 No Content
  Cache-Control: max-age=999999999,immutable
  

This is the fastest web page. You may not like it, but this is what peak performance looks like.

That may seem unhelpful — of course a useful page is slower than literally nothing! — but anything added to a frontend can only slow it down. The further something pushes you from the Web’s natural speed, the more work needed to claw it back.