Calculate the raw and gzipped size of a file + compression percentage

gzsize.sh

function gzsize {
  if [[ $1 =~ :// ]]; then
    real=$(curl -L $1 2>/dev/null | wc -c | xargs)
    gzipped=$(curl -L $1 2>/dev/null | gzip | wc -c | xargs)
  else
    real=$(cat $1 | wc -c | xargs)
    gzipped=$(cat $1 | gzip | wc -c | xargs)
  fi
  compression=$(awk -v a=$real -v b=$gzipped 'BEGIN { printf "%.2f", (1 - b / a) * 100 }')
  echo "Real:        $real"
  echo "Gzipped:     $gzipped"
  echo "Compression: $compression%"
}

alias gzs='gzsize'