title: Slow TTFB at Cloudflare with Heroku server
body: <p>I'm hosting my site at Heroku SaaS and something weird is happening with the Waterfall, to be specific the TTFB number.
  When accessing the site through the Heroku dns, I get a excellent TTFB, ~200ms. But, accessing using the Cloudflare DNS, the TTFB is ~750ms, almost 4x the Heroku DNS.
  My actual configuration, is just a redirect CNAME to heroku app (app.herokuapp.com) throughing the Cloudfare servers and a page rule to uses the Cloudflare SSL.
  Ok, the problem can be at the heroku, or at the redirect CNAME. But is there a way to improve it or do some test to identify the real problem?</p>
  
  <p><a href="https://i.stack.imgur.com/pk5hc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pk5hc.png" alt="cloudflare configuration"></a></p>