[fathyb]

It really depends on what you're using. If you use Rust with `wasm32-unknown-unknown`, you'll likely get small binaries (<200 kB). If you use C++ and Emscripten with all features enabled, then yeah you'll have multiple megabytes with all the libcxx and musl stuff.

[olsonjeffery]

My direct experience with wasm32-unknown-uknown contradicts your own. I am building a yew on nightly, moving between release or debug affects nothing.

[fathyb]

> moving between release or debug affects nothing

I'd start with that, it's an obvious red flag. Switching between both should create huge differences. Also look into `wasm-opt` from the Binaryen project for post-link optimizations, `wasm-ld` from LLVM isn't that great at DCE.