title: Difference between performance of java 7's asynchronous channels vs nonblocking socket channels
body: <p>I have once heard that asynchronous socket channels introduced in java7 have far worse performance than nonblocking io using older NIO apis (channels/selectors) on linux.
  If that's true, why it is actually the case? I have never done such benchmarking so not quite sure how to check this, and google doesn't find any info about this except one article related to jdk7 that could as well be already outdated.</p>