References:
[1] http://rick-hightower.blogspot.co.uk/2014/04/which-is-faster-java-object.html
[2] https://www.darkreading.com/informationweek-home/why-the-java-deserialization-bug-is-a-big-deal/d/d-id/1323237?
1. Never use Java Serialization ever, major security flaws. Use JSON or XML to translate object into Strings not bytes.
2. Jackson JSON serialization is much faster than built in Java object serialization.
Boon JSON serialization is much faster than Jackson JSON serialization.