Rust Coreutils 0.12 vs GNU 9.12: almost everything works the same, starting a process costs nearly 3x more

I measured Rust Coreutils (uutils) 0.12 against GNU coreutils 9.12 in containers with limits: the full GNU test suite, 157 commands with their output compared byte for byte, and process start-up. uutils is slower in 91 of 157 cells. It takes 2.8x longer to launch 5,000 processes. mv between disks loses the timestamps. Where each one wins, the full command matrix, and whether it's ready to replace GNU on a real box — in the write-up. Read the full measurements → https://efraingaray.com/en/b