I think DuckDB checks a number of these boxes! It is embedded and written in C so compilable to WASM. It is also 10x faster than SQLite and interoperable with A

I think DuckDB checks a number of these boxes! It is embedded and written in C so compilable to WASM. It is also 10x faster than SQLite and interoperable with Apache Arrow! It might be a good place to start anyway!