Am I really reading it right that he went to the trouble of doing all this to speed up the string parsing of file paths??? Talk about barking up the wrong tree.

Am I really reading it right that he went to the trouble of doing all this to speed up the string parsing of file paths??? Talk about barking up the wrong tree. I guess its cool to use something as hipster as Rust to speed up as something as hipster (albeit waning in popularity these days) as Ruby. However, a better approach would be a straight forward implementation of caching (memcache/redis/static CDN) or to simply rewrite that part of the code to not rely on constantly parsing file paths? Or use something like https://github.com/google/re2 https://github.com/google/re2, you probably won't be able to do any better than that when doing any kind of string matching and parsing. If you're concerned at all about performance you shouldn't be doing anything with the file system period.