I wonder what the wasm-backend people are doing that the embedded-backend people...

jamincan · on Feb 27, 2023

You can check out a number of strategies for reducing rust binary size here: https://github.com/johnthagen/min-sized-rust

I don't think he mentions it, and I doubt it's relevant in your Hello World example, but if you have a lot of generic code, it's useful to extract the non-generic parts into a separate non-generic function. For example:

  fn foo<T: AsRef<str>>(s: T) -> String {
      bar(s.as_ref())
  }
  
  fn bar(s: &str) -> String {
      // A whole bunch of other stuff
      s.to_string()
  }