If you download an Emacs source tarball, it comes with .elc files so you don't need to byte compile anything.
This enables you to compile the remaining (much smaller) C parts quickly: I've seen installs take under a minute!
miniblog.
Related Posts
https://elm-lang.org/news/compiler-errors-for-humans mentions the importance of layout and paragraphs for compile error messages.
Perhaps tools should do line wrapping if the terminal is very wide? It's definitely more comfortable to read.
Defining a separate tests module so rust tests compile faster:
TIL you can express pretty much all typescript type syntax in JSDoc comments: https://www.typescriptlang.org/docs/handbook/jsdoc-supported-types.html
This gives you all the IDE benefits of typescript, but you don't need a compile step to run your code.