AstonJ

AstonJ

Swift vs Rust for WASM/WebAssembly

Wondering if anyone has any thoughts on choosing between these two languages for WebAssembly?

I definitely want to explore wasm, and really love the idea of learning both of these, however, I can only squeeze one in right now.

Anyone have any thoughts? Which might be the easier route? Which will be more useful/fully featured/supported? etc.

Here are some pros and cons (from a personal perspective so far):

Rust

  • Can also be used with Elixir/Erlang nifs
  • Can also be used in other areas such as general web dev
  • Huge community support

Swift

  • Can be used for iOS/macOS apps
  • While can be used for other areas (such as web dev too - I get the feeling not quite as well as Rust)
  • Huge Apple support

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SmithyTT

SmithyTT

Rust.

Swift for WebAssembly is not quite there yet…

herbert

herbert

Author of Hands-on Rust

I don’t have a lot of experience with Swift, so I can’t really comment on it. Rust works very well with web assembly (some assembly required, heh). One of the reasons I picked up Rust was that it made it easy to write tutorials and include a web-runnable version (my Roguelike Tutorial series has each example as a playable web game - e.g. https://bfnightly.bracketproductions.com/rustbook/wasm/chapter-74-darkcity/ ).

There are downsides. If you link with C libraries, chances are you have to come up with some shims to handle the bits of the C library that don’t exist in WASM-land. Also WebGL is almost but not quite compatible with regular GL - so for graphics you’ll have to tweak things a bit.

herbert

herbert

Author of Hands-on Rust

I may have messed up the link, sorry! http://bfnightly.bracketproductions.com/rustbook/ should work.

Rust is a systems language, so its harder than Python and other very high-level languages. It tries really hard to not surprise you, and once you have the basics down it’s a relatively smooth learning curve. Some things - like threads - are much easier than other languages. Other things like the borrow checker will cause a bit of head-scratching at first.

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