Iīm getting crazy with an big latency of 12 seconds I get first time I send a request to Unicorn (after that, everything is fine).

Please, see the problem detailed in this post in stackoverflow http://stackoverflow.com/questions/26894622/big-delay-while-processing-http-request-from-nginx-to-unicorn-angularjs-to-rail

I really hope you can help me, because I donīt know what else can I check.

Thank you so much,

Roberto.