Koa – Next-generation web framework for Node.js
0s: "next generation web framework for node.js" (oh god, not another)<p>5s: "designed by the team behind Express" (wait what?)<p>6s: "Through leveraging generators Koa allows you to ditch callbacks" (wow, ok. oh hey, that makes "next generation" not just marketing fluff)<p>18s:<p><pre><code>  app.use(function *(next){
    var start = new Date;
    yield next;
    var ms = new Date - start;
    this.set('X-Response-Time', ms + 'ms');
  });
</code></pre>
(oh sweeet)