Deno is a JavaScript runtime built in Rust, so I guess it depends what you mean by "types". Definitely not a strong typing, although the example could be rewritten to TypeScript, which Deno supports natively.
I use Deno sometimes, so it was of interest to me to compare it to the advancements presented here for Go.
I like Deno (v8 is written in C++, not Rust, for what it's worth); the question is just: is it doing the same work that the encoding/json benchmark is doing? What are we comparing?
You can see in the linked code that it just calls `const parsed = readJsonSync(fileName)`, which likely returns an untyped struct. So this purely does parsing into an anonymous structure, and not validation and mapping into something strongly typed