There are a few posts told you how to integrate bundler into capistrano, but they are out of date now. After bundler 1.0 released, you can add only one line in capistrano to use bundler.implemented
Your capistrano deploy.rb file might become complicated with the growth of your application, contain more and more cap tasks, it would be better to split these tasks into different files according to the functionalities, which makes it easy to maintain, and they are more likely to be reused in the future.
Rails is integrated with sprockets from 3.1, which gives you the power to pre-process, compress and minify your assets. It's awesome, but it slows down deployment a lot.implemented