>In Rust, just as in Java, people write highly optimized safe and fast data structures and others build upon that. I'm currently taking a class on API design w

>In Rust, just as in Java, people write highly optimized safe and fast data structures and others build upon that. I'm currently taking a class on API design with Josh Bloch (Java Collections, Effective Java, etc.), who pointed out that this wasn't the case until the late 90s or so - he pulled out an example of a KWIC system [1] described in a paper [2] from 1971: Parnas 1971: This is a small system [that] could be produced by a good programmer within a week or two. And then Josh proceeded to show his implementation of the same system, which he had written in <2 hours just by making use of the built-in collections, regular expressions, sorting, string formatting, etc. It's really cool that these standard data structure implementations exist and are so accessible, making people orders of magnitude faster than before. [1] https://en.wikipedia.org/wiki/Key_Word_in_Context https://en.wikipedia.org/wiki/Key_Word_in_Context [2] https://prl.ccs.neu.edu/img/p-tr-1971.pdf https://prl.ccs.neu.edu/img/p-tr-1971.pdf