Rust's BufRead, And When To Use It

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Rust is a low-level language, and its standard library is careful to give the programmer lots of control over how things will behave and avoid implicit behavior, especially when that behavior impacts performance. But at the same time, it doesn't want to make the programmer's life harder than it needs to be. As a result, Rust's language features and standard library often give you access to really low-level concepts with no assumptions baked in, but then also give you abstractions you can optionally layer on top.