Three ways to smuggle SQLite into Nix
fzakaria.com
2 threads
It seems that you could just compile the data into the WASM blob. Then use a more optimized query engine than sqlite. This should be very fast to compile (most of the WASM is just a byte buffer, the code is just a few binary searches and some result encoding). The downside is that you need to recompile to update the repo, but I don't think that should be particularly expensive.
The WASM extension me like. Would be great to get that into mainline.