An option to compress the file contents

[mpoon]

GPT-4, can you help me with these items:

• what are some ways to compress the file contents without losing data so that the output file is smaller than the default output file
• can you choose the most promising of your suggestions and add a new option to allow users to compress the file contents
• update the README so new users know how to use this option

[randomwangran]

duplicated:
#35