title: tradeoffs of different compression algorithms
body: <p>What are the tradeoffs of the different compression algorithms?</p>
  
  <p>The purpose is backup, transfer &amp; restore. I don't care about popularity, as long as a mature enough tool exists for unix. I care about </p>
  
  <ul>
  <li>time</li>
  <li>cpu</li>
  <li>memory</li>
  <li>compression level</li>
  </ul>
  
  <p>the algorithms I am considering are </p>
  
  <ul>
  <li>zip</li>
  <li>bzip</li>
  <li>gzip</li>
  <li>tar</li>
  <li>others?</li>
  </ul>