class BenchmarkDriver::Output::Simple

def with_benchmark(&block)
  @with_benchmark = true
  without_stdout_buffering do
    # Show header
    $stdout.puts "#{@metrics.first.name} (#{@metrics.first.unit}):"
    # Show executable names
    if @context_names.size > 1
      $stdout.print("#{' ' * @name_length}  ")
      @context_names.each do |context_name|
        $stdout.print("%#{NAME_LENGTH}s  " % context_name)
      end
      $stdout.puts
    end
    block.call
  end
ensure
  @with_benchmark = false
end