For fun I started porting the example over: <a href="https:&#x2F;&#x2F;gist.github.com&#x2F;steveklabnik&#x2F;f86cba4da1dc9c5c68e0" rel="nofollow">https:&#x2F;&#x2F;gist.github.com&#x2F;steveklabnik&#x2F;f86cba4da1dc9c5c68e0</a><p>Then I realized that it wasn&#x27;t totally clear to me what json_list_to_str_vector() should do, exactly, and so I don&#x27;t even know how it would compare.<p>When this article was written Rust had a big runtime. It was a very different language. OCaml is pretty fast, but I would still expect Rust to fare much, much better today.