title: HTTP2, NginX but still high TTFB
body: <p>No matter what changes we've made TTFB is high!
  Surprisingly, server side guy insists that everything is set correct and the server runs fast enough but <a href="http://www.webpagetest.org/result/161207_N2_3750bc868388da081af91333f701c8fe/" rel="nofollow noreferrer">webpagetest</a> report didn't change at all!
  After so much optimization, I can't believe it doesn't change and I started to suspect TLS, gZIP and redirections...
  Did I miss something?</p>