In-Browser WASM Performance: DuckDB, Apache Arrow, and Web Workers in Action

Motif Analytics built a highly interactive in-browser analytics tool using DuckDB WASM, Apache Arrow, and Web Workers, enabling users to experiment without commitment. The article details the upsides and downsides of this tech stack, including DuckDB WASM's performance (slower than native but optimizations help), and schema inconsistencies encountered when parallelizing with Web Workers (e.g., data insertion failures due to schema mismatches). Bugs and limitations are shared, highlighting DuckDB WASM's rapid development and promising future improvements.