rbr.bio initial data loading is much faster now. Check out https://rbr.bio/npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f237lmu63q0uf63m and start browsing. It's still not perfect (still relying on info.json somewhat), but writerelays and metadata for user are loaded first, and cached (using caching of RelayPool).
I also added merging of posts with replies that are in the same thread. This will help a lot when viewing more complex interations in the future.