More things that I've found helped: - Use wasm-opt from binaryen. That seems to reliably drop wasm size by ~20-30%. ( https://github.com/WebAssembly/binaryen h

More things that I've found helped: - Use wasm-opt from binaryen. That seems to reliably drop wasm size by ~20-30%. ( https://github.com/WebAssembly/binaryen https://github.com/WebAssembly/binaryen ) - Use brotli compression for serving wasm bundles to the browser, and make sure your web server is setup to use the brotli compressed files. (Its a 1 line change in nginx, for example). Brotli drops the size of wasm bundles by about 3x. Its much better than gzip for wasm.