I'm not sure what flags wasm-pack uses, but you can try using opt-level=s for smaller codegen. Also lto can help. You can take a look at cargo-bloat. It's some

I'm not sure what flags wasm-pack uses, but you can try using opt-level=s for smaller codegen. Also lto can help. You can take a look at cargo-bloat. It's sometimes surprising what code takes up all the space. There are some general tips here: https://github.com/johnthagen/min-sized-rust https://github.com/johnthagen/min-sized-rust