Java Object Serialization Performance tips

Question

I must serialize a huge tree of objects (7,000) into disk. Originally we kept this tree in a database with Kodo, but it would make thousands upon thousands of Queries to load t

Answer 1

I would recomend you to implement custom writeObject() and readObject() methods. In this way you will able eleminate writting chidren nodes for each node in a tree. When you use default serialization, each node will be serialized with all it's children.

For example, writeObject() of a Tree class should iterate through the all nodes of a tree and only write nodes data (without Nodes itself) with some markers, which identifies tree level.

You can look at LinkedList, to see how this methods implemented there. It uses the same approach in order to prevent writting prev and next entries for each single entry.