perform

# File railties/lib/rails/commands/stats/stats_command.rb, line 7
      def perform
        require "rails/code_statistics"
        boot_application!

        stat_directories = Rails::CodeStatistics.directories.map do |name, dir|
          [name, Rails::Command.application_root.join(dir)]
        end.select { |name, dir| File.directory?(dir) }

        Rails::CodeStatistics.new(*stat_directories).to_s
      end