title: Improve slow Rails startup time (rails console, rails server)
body: <p>I work with several Rails apps, some on Rails 3.2/Ruby 2.0, and some one Rails 2.3/Ruby 1.8.7.</p>
  
  <p>What they have in common is that, as they've grown and added more dependencies/gems, they take longer and longer to start.  Development, Test, Production, console, it doesn't matter; some take 60+ seconds.</p>
  
  <p>What is the preferred way to first, profile for what is causing load times to be so slow, and two, improve the load times?</p>