Compare {gzip, brotli, bzip2, xz} {compress, decompress} {ratio, speed, memory usage}.

compress_compare.sh

#!/bin/bash

# Compare {gzip, brotli, bzip2, xz} {compress, decompress} {ratio, speed, memory usage}.
# Usage: bash compress_compare.sh <filename>
# You need to install (yum, dnf, apt or compile)  brotli gzip bzip2 xz time  first.
# https://github.com/google/brotli
# references: http://mattmahoney.net/dc/text.html

FILENAME=${1}
FILESIZE=$(stat --printf="%s" ${FILENAME} 2>/dev/null)

gz_compress () {
    RESULT=$({ /usr/bin/time -v gzip -${2} ${1} -c > ${1}.${z}; } 2>&1)
    RESULT_DE=$({ /usr/bin/time -v gzip -d ${1}.${z} -c > /dev/null; } 2>&1)
}

br_compress () {
    rm -f "${1}.${z}";
    RESULT=$({ /usr/bin/time -v brotli --input ${1} --quality ${2} --output ${1}.${z}; } 2>&1)
    RESULT_DE=$({ /usr/bin/time -v brotli --decompress --input ${1}.${z} --output ${1}.tmp; } 2>&1)
    rm -f "${1}.tmp";
}

bz2_compress () {
    RESULT=$({ /usr/bin/time -v bzip2 -z -${2} ${1} -c > ${1}.${z}; } 2>&1)
    RESULT_DE=$({ /usr/bin/time -v bzip2 -d ${1}.${z} -c > /dev/null; } 2>&1)
}

xz_compress () {
    RESULT=$({ /usr/bin/time -v xz -z -${2} ${1} -c > ${1}.${z}; } 2>&1)
    RESULT_DE=$({ /usr/bin/time -v xz -d ${1}.${z} -c > /dev/null; } 2>&1)
}

compress_result () {
    ${z}_compress ${1} ${2}
    TIME=$(echo -e "${RESULT}" | grep "User time" | awk -F ": " '{ print $2 }')
    MEM=$(echo -e "${RESULT}" | grep "Maximum resident set size" | awk -F ": " '{ print $2 }')
    COMPRESSED_SIZE=$(stat --printf="%s" ${FILENAME}.${z} 2>/dev/null)
    RATIO=$(echo ${COMPRESSED_SIZE} ${FILESIZE} | awk '{ printf "%0.4f" ,$1/$2 }')
    TIME_DE=$(echo -e "${RESULT_DE}" | grep "User time" | awk -F ": " '{ print $2 }')
    MEM_DE=$(echo -e "${RESULT_DE}" | grep "Maximum resident set size" | awk -F ": " '{ print $2 }')
    echo -e "${z}\t${i}\t${FILESIZE}\t${COMPRESSED_SIZE}\t${RATIO}\t${TIME}\t${MEM}\t${TIME_DE}\t${MEM_DE}"
}

download_testdata () {
    wget -c -t 5 \
        https://raw.githubusercontent.com/jquery/jquery/f71eeda0fac4ec1442e631e90ff0703a0fb4ac96/dist/jquery.min.js \
        https://raw.githubusercontent.com/vuejs/vue/b977c77d344cb1fc63a3daa50a4b96ef70e77ec5/dist/vue.min.js \
        https://raw.githubusercontent.com/twbs/bootstrap/0b9c4a4007c44201dce9a6cc1a38407005c26c86/dist/css/bootstrap.min.css \
        https://www.freebsd.org/doc/handbook/book.html
# jquery.min          3.2.1
# vue.min             2.3.2
# bootstrap.min       3.3.7
# freebsd handbook    50234
    tar -cf testdata.tar jquery.min.js vue.min.js bootstrap.min.css book.html \
        && rm -f jquery.min.js vue.min.js bootstrap.min.css book.html
    FILESIZE=$(stat --printf="%s" testdata.tar 2>/dev/null)
}

if [ -z "${1}" ] || [ ! -f "${1}" ]; then
    #download_testdata
    #FILENAME="testdata.tar"
    echo "Please specify a valid file."
    exit 1
## You can uncomment 'download_testdata' & 'FILENAME="testdata.tar"' and
## delete the next 2 lines to download testdata automatically.
fi

echo -e "format\tlevel\tsize\tsize_c\tratio\ttime\tmemory\ttime_de\tmemory_de"
for i in {1..9}; do
    for z in gz br bz2 xz; do
        compress_result ${FILENAME} ${i}
    done
done

for i in {10..11}; do
    z='br'
    compress_result ${FILENAME} ${i}
done

exit 0