instance method output_filename

# File activesupport/lib/active_support/testing/performance.rb, line 206
          def output_filename(printer_class)
            suffix =
              case printer_class.name.demodulize
                when 'FlatPrinter'; 'flat.txt'
                when 'GraphPrinter'; 'graph.txt'
                when 'GraphHtmlPrinter'; 'graph.html'
                when 'CallTreePrinter'; 'tree.txt'
                else printer_class.name.sub(/Printer$/, '').underscore
              end

            "#{super()}_#{suffix}"
          end