> Duh. It doesn't really matter what Rust has have went it comes to enabling the use of specific edge-case performance improvements for specific purposes. Inefficient AI-generated code without a clue of other approaches doesn't move the needle. Religious purity doesn't matter, only results matter.

No idea what this incoherent, ungrammatical paragraph is supposed to be saying. But if you're under the impression Rust doesn't have its own buffered IO facilities or that using Rust-native libraries offers only "religious purity" benefits over extern "C" stuff, you're mistaken.

This has diverged from what I'm interested in discussing anyway; see my question upthread about if there are any LLM tools that gather requirements from incomplete specs in the way I expect human engineers to. In this case, I'd expect it to ask questions such as "how large are input files expected to be?" Better, ask what the greater purpose is, as "character by character" is rarely useful.