Marko[1] immediately comes to mind. It’s developed by, and powers most of, eBay. High performance, “isomorphic” (same code runs server-/client-side), small client bundle with automatic “partial hydration” (compiler uses static analysis to only send JS for interactive parts of the view).

Another good option might be Astro[2] which has a lot of similar goals to Marko, but lets you “bring your own framework” for the interactive parts, so you can achieve a similar experience to Marko with more mainstream tools/syntax.

1: https://markojs.com/

2: https://astro.build/