_files=(
        mysql-01.sql
        mysql-02.sql
        mysql-03.sql
        json-01.json
        json-02.json
        bgp-mrt.tsv
    )

_methods=(
        gzip:1 gzip:3 gzip:6 gzip:9
        bzip2:1 bzip2:3 bzip2:6 bzip2:9
        zstd:1 zstd:3 zstd:6 zstd:9
        lzip:0 lzip:1 lzip:3 lzip:6 lzip:9
        xz:0 xz:1 xz:3 xz:6 xz:9
    )




(
set -e -E -u -o pipefail

for _file in "${_files[@]}" ; do
    for _method_0 in "${_methods[@]}" ; do
        _method="${_method_0%%:*}"
        _level="${_method_0#*:}"
        case "${_method}" in
            ( gzip ) _compressor=( gzip -"${_level}" --rsyncable ) ; _extension=gzip ;;
            ( bzip2 ) _compressor=( bzip2 -z -"${_level}" ) ; _extension=bz2 ;;
            ( zstd ) _compressor=( zstd -z -"${_level}" -q --rsyncable --threads=1 ) ; _extension=zst ;;
            ( lzip ) _compressor=( lzip -"${_level}" -b 1048576 ) ; _extension=lz ;;
            ( xz ) _compressor=( xz -z -"${_level}" -q -F xz -C sha256 -T 1 ) ; _extension=xz ;;
        esac
        printf -- '[ii]  compressing `%s` with `%s` / `%s`...\n' "${_file}" "${_method}" "${_level}" >&2
        mkdir -p -- "${_file}--${_method}"
        /usr/bin/time \
                -o "${_file}--${_method}/${_file}--${_method}-${_level}.log" \
                -f '(( elapsed: %E (user: %U, kernel: %S), CPU: %P, memory: %M (faults: %F, swapped: %W), I/O: %I / %O (waits: %w) ))' \
                -- \
        "${_compressor[@]}" \
            < "${_file}" \
            >| "${_file}--${_method}/${_file}--${_method}-${_level}.${_extension}" \
        #
        sleep -- 1s
    done
done
)




(
set -e -E -u -o pipefail

printf -- 'method'
for _file in "${_files[@]}" ; do
    printf '\t%s\t\t\t' "${_file}"
done
printf -- '\n'

for _method_0 in none "${_methods[@]}" ; do
    _method="${_method_0%%:*}"
    _level="${_method_0#*:}"
    case "${_method}" in
        ( none ) ;;
        ( gzip ) _extension=gzip ;;
        ( bzip2 ) _extension=bz2 ;;
        ( zstd ) _extension=zst ;;
        ( lzip ) _extension=lz ;;
        ( xz ) _extension=xz ;;
    esac
    printf -- '%s' "${_method_0}"
    for _file in "${_files[@]}" ; do
        if test "${_method_0}" != none ; then
            _size="$(
                    du --summarize --apparent-size --block-size 1048576 -- "${_file}--${_method}/${_file}--${_method}-${_level}.${_extension}" \
                    | cut -f 1 -d $'\t'
                )"
            _time="$(
                    cat "${_file}--${_method}/${_file}--${_method}-${_level}.log" \
                    | sed -r -e 's#\(\( elapsed: ([^ ]+) \(user: ([^ ]+), kernel: ([^ ]+)\), CPU: [^ ]+%, memory: ([^ ]+) \(faults: ([^ ]+), swapped: [^ ]+\), I/O: ([^ ]+) / ([^ ]+) \(waits: ([^ ]+)\) \)\)#\2\t\3\t\4#'
                )"
        else
            _size="$(
                    du --summarize --apparent-size --block-size 1048576 -- "${_file}" \
                    | cut -f 1 -d $'\t'
                )"
            _time=$'-\t-\t-'
        fi
        printf -- '\t%s\t%s' "${_size}" "${_time}"
    done
    printf -- '\n'
done
)