title: Builtin append vs. bytes.Buffer write
body: <p>In the situation where I need to add an unknown amount of data to a slice of byte, let say in a loop, I could either way use the builtin function <code>append()</code> or create a new <code>Buffer</code> and use the <code>Write()</code> function.</p>
  
  <p>Which method is fastest ?</p>