Ultra-slow mtime insertion sort

mtimes.bash

function mtimes {
    typeset x=
    typeset -i n=0
    for x; do
        n=0
        if [[ -d $x ]]; then
            mtimes "$x"/*
        else
            while [[ ${arr[n]+$x} -ot ${arr[n]} ]]; do
                ((n++))
            done
            arr=("${arr[@]:0:n}" "$x" "${arr[@]:n}")
        fi
    done
}

typeset -a arr
${1:+mtimes "$@"}
stat -c %y\ %n "${arr[@]}"