Analyzing a Collection

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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.