ChimeraDB — SQLite and DuckDB, in your browser

The whole ChimeraDB stack — SQLite (OLTP), DuckDB (analytics), and Arrow — compiled to WebAssembly components and transpiled to JavaScript by jco, running entirely in this page. No server, no wasmtime. Write rows into SQLite, they're snapshotted into DuckDB, and the analytics query runs on DuckDB — all client-side. First run downloads ~60 MB of engine wasm (then cached).

1. OLTP — write into SQLite (system of record) 2. Analytics — query the DuckDB snapshot