3 Seconds of compilation shaved by metadata analysis

No AI is used in my work; or research; or writing; or anything else really. (=｀ェ´=) Go to your Rust codebase and pick a dependency. How much do you use that dependency? How many functions do you use from bitflags? From chrono? From hashbrown? How many items does your dependency pull from other dependencies? And how many end up being linked in the final binary or re-compiled during compilation?