“Today, using Zig’s incremental compilation, you can make changes to real, complex applications in a matter of milliseconds.”

Five second cold build, then 50 to 70 milliseconds per rebuild by tracking a dependency graph and patching the binary in place instead of relinking. The limits are stated plainly: x86_64 Linux only, other backends are not ready, and you have to opt in with zig build --watch -fincremental. Compare that to every other compiler team that ships a benchmark and hides the caveats in a footnote.