The Lies Your ORM Tells You

Hibernate, JPA, and the Performance Debt Hidden in Plain Sight.

This book targets senior Java developers who have shipped production systems with Hibernate. You know what @Entity does. You know what a transaction is. You have deployed code that worked in dev and cratered in production because Hibernate generated SQL you never expected, executed queries you never asked for, and cached data you thought was fresh.

Every chapter follows the same structure: the lie Hibernate tells you, the reality of what happens at the SQL and JVM level, working code that proves it, the fix, and an honest accounting of when the fix matters and when it does not.

Code examples use Java 21, Hibernate 6, and Spring Data JPA. Generated SQL is shown beneath every example. Performance impact is measured, not hand-waved.

This book was generated using AI assistance.