That's the joke, no computation needs to happen because for as long as there exists JavaScript, there will to be an incessant stream of gratuitous JavaScript frameworks.
I feel like it would be 10x funnier if it actually linked to a 1-day-old framework each day.
Yes, virtually empty and yet still takes 0.4s to get to First Contentful Paint. Maybe the author should look into a more performant framework.
Maybe (s)he should make a new one to combat this issue. In all seriousness though the amount of nextjs dependencies on this practically static site is probably part of the joke.