title: Netty - Using the EventLoop to combine operations?
body: <p>I came across <a href="http://normanmaurer.me/presentations/2014-facebook-eng-netty/slides.html#28.0" rel="nofollow">this</a> suggestion to combine operations by using the underlying channel's EventLoop to execute them together. In the example provided, write operations are used. It was my assumption was that write operations were already done asynchronously on an I/O thread (the EventLoop?) provided by Netty... so why is it necessary to execute multiple operations using the EventLoop the channel is assigned to?</p>
  
  <p>Also, if doing operations on the EventLoop thread provides some sort of performance benefit then why does that only apply to multiple operations and not single ones?</p>
  
  <p>Any clarification would be appreciated! Thanks.</p>