With Go basic stuff like url parsing or HTTPS support is written in Go and comes with the standard library. With Rust too many necessary things are just wrappers around C and C++ making cross-compilation and reproducible builds much harder to archive.
As for availability if CGO is ok, then calling C or C++ code from Go is not that hard. Also, there is always an option to just start C++ process if extra data copies are OK.
As for availability if CGO is ok, then calling C or C++ code from Go is not that hard. Also, there is always an option to just start C++ process if extra data copies are OK.