My application is deployed in heroku(Rails app) and Domain from GoDaddy. For DNS I used CloudFlare.
When I open heroku URL of my application it opens much faster than domain name URL which is used from cloudflare. Please look into it.
As It was not working. I have to switch DNS server.
and even website was loading too slow.
Let me know once @sdayman you are available for help. I will switch my dns Server to cloudflare.
@sdayman Please reply.