title: Is buffer_size = file size useful for Rails send_file?
body: <p>If the file sent with <a href="http://ap.rubyonrails.org/classes/ActionController/Streaming.html#M000044" rel="nofollow">send_file</a> is similar in size to the default buffer size (4096 bytes), <em>does it always make sense to use <code>stream: false</code>?</em> For example, are there proxies or browsers that break badly if the buffer size is non-standard?</p>
  
  <p>Related:</p>
  
  <ol>
  <li>Does the buffer size refer to the <em>file</em> or the <em>HTTP packet</em>?</li>
  <li>Can you recommend a Firefox extension to inspect HTTP packets at this level?</li>
  </ol>