ratiscat

rat is a performance oriented re-implementation of cat in rust

See rat.rs

For a fully fledged coreutils rust stack see uutils: https://github.com/uutils/coreutils/

Motivation

I just wanted to do this as a learning experience for rust.

At least, that's how it started.

Things learned in relation to rust:

• Stdout in rust will always be wrapped by LineWriter which flushes on new line

Wrap the raw file descriptor in BufWriter<File> instead for more control

• Pre-allocation given a Sized Vec<u8> for buffer has some interesting impacts on runtime performance

Even when that vector is immediately cleared on runtime the behavior between initially empty vs. initially Sized vector is noticeable