code: private int compareChunks(final String thisChunk, final String thatChunk) {
          final int thisChunkLength = thisChunk.length();
          for (int i = 0; i < thisChunkLength; i++) {
              final int result = thisChunk.charAt(i) - thatChunk.charAt(i);
              if (result != 0) {
                  return result;
              }
          }
          return 0;
      }
docs: Compare two chunks based on assumed same length. 0 if the same.
  
  @param thisChunk the first chunk to be compared
  @param thatChunk the second chunk to be compared
  @return the difference in length (l1 - l2)