Debug rails autoloading

autoload.rb

module Rails
  class Application
    alias_method :old_eager_load, :eager_load!
    def eager_load!
      puts "Eager Loading from Rails::Application"
      old_eager_load
    end
  end
end

module Rails
  class Engine
    alias_method :another_eager_load, :eager_load!
    def eager_load!
      puts "Eager Loading from #{self.class.name}"
      another_eager_load
    end
  end
end

module ActiveSupport
  module Dependencies
    module ModuleConstMissing
      alias_method :old_const_missing, :const_missing
      def const_missing(name)
        puts "Trying to find constant #{name}"
        old_const_missing(name)
      end
    end
  end
end