Inline functions don't all bloat the bytecode. In the example, there's 3 function calls, 3 if/else, and a few local variables introduced. Using a class would actually lead to more bytecode bloat, I'll let you check that. Note that I never said to never use a class to return multiple values, I just showed another way, which makes sense in some cases like the one I showed.

That one is a good alternative. It's not immune to late racers (so, the use case of race rather than raceOf ), but I believe it's possible to make some edits that make it supported and thread-safe for this use case. Now I'm wondering what would perform best between your snippet and using select.

Can't work for the same reason as the other one you shared. For reference, here's a playground that proves it: https://pl.kotl.in/MArMNltGT

Marek Langiewicz Nope, the winner's job is not finished until after the launch block is complete, so cancellation happens before, so it cannot work. Here's a playground that proves it: https://pl.kotl.in/MArMNltGT

This cannot work, because it also cancels the coroutine that is about to win.

I hope we can have themes that affect only the code snippets color schemes. My top wish is light scheme on light theme, and dark scheme on dark theme.

Please, when you add editing support, implement a reliable offline mode.