title: How can I quickly make a text file unreadable to humans?
body: <p>I want to encode a text file in the fastest way possible, just make it unreadable by humans.</p>
  
  <p>Maybe flipping the first bit of each byte, or something that can be done very quickly so that it doesn't slow down the script. The text file will be several MB in length, so whatever is the fastest method possible to make it unreadable.</p>