I understand what you mean. In fact, I think we should more frequently do the opposite: we should publicly shame slow websites (cough new Reddit).

Anyway, for fast SPAs, here is a useful comparison: the "RealWorld app" demo.

I would urge everyone to look at the Lighthouse audits for these three implementations:

React/Redux: https://react-redux.realworld.io/

Angular: https://angular.realworld.io/

Vue: https://vue-vuex-realworld.netlify.app/#/

Svelte/Sapper: https://realworld.svelte.dev/

Solid.js: https://ryansolid.github.io/solid-realworld/

This is just a demo, of course, but it is close enough to be representative. From just this simple demo we can already see significant differences: Svelte and Solid.js are much snappier. The author of the article, Rich, created Svelte.

Of course, this is just talking about performance, not yet getting accessibility, navigation, transitions, etc right.