I have a CSV file of size 15GB with a row count of 500k. When I use ruby zip to make it zip it will create a file with a size of 2.83 GB. and when I extract this file it contains only 87k with size 2.5 GB.

rubyzip version 1.3.0 I also tried with 2.3.0 and it did not work

  zip_file = "myfile.zip"
   Zip::File.open(zip_file, Zip::File::CREATE) do |zipfile|
     Dir.glob("/15gb.csv").each do |csv_file_path|
       csv_file_name = csv_file_path.split('/').last
       zipfile.add(csv_file_name, csv_file_path)
     end
   end