In 2017, as part of my master's thesis, I did a rewrite of Austria's most popular voting advice application wahlkabine.at.
The site does not contain many features, but it had to be fast, accessible, cheap to host and work offline for users on the Viennese subway.
I managed to do all of this by "just" using the latest developments in web technologies and cutting out all unnecessary requests a common website would make.

In this talk, I want to share all the tricks and techniques I applied to reduce the number of requests necessary until a webpage becomes usable.
Reducing the number of roundtrips and overall bytes loaded from the server not only reduces your hosting bill but also your carbon footprint.
You'll walk away from this talk with new ideas on how to optimize your own projects or if nothing else at least increase their perceived performance.