Function output_all_bytes 

pub async fn output_all_bytes<R, I>(
    commands: I,
    concurrency: usize,
    runner: &R,
) -> Vec<Result<ProcessResult<Vec<u8>>>> 
where
    R: ProcessRunner + ?Sized,
    I: IntoIterator<Item = Command>,

The raw-bytes companion to output_all: captures each command’s stdout as Vec<u8> instead of decoded text. All other semantics are identical — see output_all.