Optimize Check Max Collection Length for New Collections

  public long readArrayStart() throws IOException {
    collectionCount = SystemLimitException.checkMaxCollectionLength(0L, doReadItemCount());
    return collectionCount;
  }

  /**
   * A block with count zero indicates
   * the end of the array. If a block's count is negative, its absolute value is
   * used, and the count is followed immediately by a long block size indicating
   * the number of bytes in the block.
   */
protected long doReadItemCount() throws IOException {
    long result = readLong();
    if (result < 0L) {
      // Consume byte-count if present
      readLong();
      result = -result;
    }
    return result;
  }