code: def range(start, limit, ratio: 8)
        check_greater(start, 0)
        check_greater(limit, start)
        check_greater(ratio, 2)
  
        items = []
        count = start
        items << count
        (limit / ratio).times do
          count *= ratio
          break if count >= limit
          items << count
        end
        items << limit if start != limit
        items
      end
docs: Generate a range of inputs spaced by powers.
  
   The default range is generated in the multiples of 8.
  
   @example
     Benchmark::Trend.range(8, 8 << 10)
     # => [8, 64, 512, 4096, 8192]
  
   @param [Integer] start
   @param [Integer] limit
   @param [Integer] ratio
  
   @api public