[dragonwriter]

> Ruby is so slow that you end up writing C extensions when you want to do any non-trivial computation. The documentation is bad, the tooling is bad, the build/CI complications are bad, and there's not much community info online about the process.

Perhaps for a classic C extension that's true, but (for portability across Ruby interpreters and other reasons), using FFI is usually the preferred way to do new C interop, and none of that is true for FFI.