code: @Benchmark String charsToBitSet(int reps) {
      /*
       * This benchmark now measures the complete parsing of a char[] rather than
       * a single invocation of {@link BitSet#set}. However this fine because
       * it is intended to be a comparative benchmark.
       */
      for (int i = 0; i < reps; i++) {
        for (int n = 0; n < bitString.length; n++) {
          bitSet.set(n, bitString[n] == '1');
        }
      }
      return bitSet.toString();
    }
docs: This benchmark parses a char[] of 1's and 0's into a BitSet. Results from
  this benchmark should be comparable with those from
  {@link #charsToMask(int)}.