Performance improvement for ActionController::Responder#to_format

gistfile1.rb

# Orignal

module ActionController
  class Responder
    def to_format
      if get? || !has_errors? || response_overridden?
        default_render
      else
        display_errors
      end
    rescue ActionView::MissingTemplate => e
      api_behavior(e)
    end
  end
end

# Becomes:

module ActionController
  class Responder
    def to_format
      begin
        return begin
          if get? || !has_errors? || response_overridden?
            default_render
          else
            display_errors
          end
        end
      rescue ActionView::MissingTemplate => e
        api = -> { api_behavior(e) }
      end
      api.call
    end
  end
end