&gt; If you want to compare languages, compare languages. If you want to compare particular implementations of languages, compare particular implementations of languages.<p>Well, to be fair, it says this at the top:<p><i>This post compares Rust-1.8.0 nightly to OpenJDK-1.8.0_60</i><p>I think it&#x27;s pretty clear it&#x27;s comparing particular implementations of the languages.