Analyzing a Collection

You can use the Collection class getStatistics method to analyze the collection receiver and return structural statistics of the collections, as follows.

• Actual block size of the collection

• Size of the key in bytes (object id (6) for sets and Integer (4) for arrays)

• Size of each collection entry in bytes

• Total number of blocks in the collection

• Total number of entries in the collection

• Height (that is, the number of levels) in the collection (which is always 1 for arrays)

• Minimum number of entries found in any block

• Maximum number of entries found in any block

• Average number of entries in collection blocks

• The actual average percentage loading of collection blocks (entries for each block)

For details, see Chapter 1 of the JADE Encyclopaedia of Classes.