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by fathyb 751 days ago
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.
1 comments
olsonjeffery 751 days ago
My direct experience with wasm32-unknown-uknown contradicts your own. I am building a yew on nightly, moving between release or debug affects nothing.
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fathyb 751 days ago
> 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.

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olsonjeffery 751 days ago
Thanks for the feedback.

I was wrong about debug vs release; It's the difference between 4.0MB & 893KB on a ~500 LOC rust codebase (per cloc).

I want to observe that your suggestions don't undermine or refute my point about problems that WASM adoption faces. This serves to underline that the developer experience needs work. Opinions may differ on how much. Also that "developer experience" runs on multiple axes of concern (bin size, perf, accessibility, utility of language, etc).

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fathyb 751 days ago
I agree, my personal take: if you don't want to get your hands dirty, WebAssembly is not ready for you yet. It'll take at least 5 more years before the tooling gets into a state where things should just work (especially DWARF support). I mean, we still cannot free memory! (actually there is a crazy way by recreating a new WebAssembly instance with a shrunk'd `ArrayBuffer`, but it requires you writing your own memory allocator)

My point is: if you're comfortable working with a slightly obscure microcontroller, then you won't have much problems. LLVM supports WebAssembly out of the box, so it mostly feels like programming for one of those.

Anecdotally: we run a large Rust app in under 1 MB of WebAssembly at Zscaler.

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worik 751 days ago
> 4.0MB & 893KB on a ~500 LOC rust codebase (per cloc).

My guess is 50,000 LOC would not be 100 times bigger err

Methinks you are counting overhead

More accurately... meguess

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