In Relation To

When we profiled our application’s data import pipeline, we expected the bottleneck to be in our business logic — JQ filters, JavaScript evaluation, recursive SQL queries. Instead, Hibernate’s internal JSON handling consumed over 50% of CPU time and allocated 20 GB of unnecessary objects during a routine import of 5 records.

Two small annotation changes fixed it. No code changes, no architectural redesign — just telling Hibernate what it needs to know about how our application uses its data.

As we spent the last year preparing for the first stable release of Hibernate Reactive we have been trying to answer some questions we had.