Background Blog post What Color is Your Function? (2015) by Bob Nystrom highlighted problems of async computation handling in programming language design. It has started heated discussions on Hacker News and Reddit. Although many solutions to this problem were suggested, none of them seemed to be a silver bullet. In the Zig Roadmap 2026 stream Andrew Kelley announced a new way of doing I/O, and Loris Cro wrote a Zig’s New Async I/O blog post describing it in more details. This is the example Zig...