Comparison of Hibernate with Derby embedded vs OpenJPA with PostgreSQL server

Each of the following tables focuses on a specific database operation, where the last table presents average results comparison.

Speed comparison of JPA database persistence operations (normalized score, higher is better)

Transaction Size =>	Few Entities		Many Entities		Average Score
	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server
Basic Person Test	5.9	5.2	3.8	4.8	4.9	5.0
Element Collection Test	2.9	2.8	1.8	2.2	2.3	2.5
Inheritance Test	5.3	4.6	3.7	3.2	4.5	3.9
Indexing Test	7.0	7.4	4.8	6.9	5.9	7.1
Graph (Binary Tree) Test	1.9	0.98	1.7	0.81	1.8	0.89
Multithreading Test	10.5	23.4	3.7	9.1	7.1	16.2
All Tests	5.6	7.4	3.3	4.5	4.4	5.9

The results above show that in general OpenJPA with PostgreSQL server is more efficient than Hibernate with Derby embedded in persisting JPA entity objects to the database.

A large performance gap has been detected when using multithreading with large transaction size. Comparing the normalized speed of Hibernate with Derby embedded database (3.7) to the normalized speed of OpenJPA with PostgreSQL database server (9.1) reveals that in that case, OpenJPA with PostgreSQL server is 2.5 times faster than Hibernate with Derby embedded.

On the other hand, OpenJPA with PostgreSQL server is slower, for instance, when using graphs of objects with large transaction size. Comparing the normalized speed of OpenJPA with PostgreSQL database server (0.81) to the normalized speed of Hibernate with Derby embedded database (1.7) reveals that in that case, OpenJPA with PostgreSQL server is 2.1 times slower than Hibernate with Derby embedded.

Speed comparison of JPA database retrieval operations (normalized score, higher is better)

Retrieval Size =>	Few Entities		Many Entities		Average Score
	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server
Basic Person Test	14.2	5.8	16.4	16.1	15.3	10.9
Element Collection Test	4.4	0.013	4.9	8.7	4.6	4.4
Inheritance Test	10.3	5.2	18.6	17.6	14.4	11.4
Indexing Test	10.0	4.8	16.4	18.7	13.2	11.8
Graph (Binary Tree) Test	2.6	0.27	3.0	0.35	2.8	0.31
Multithreading Test	19.3	11.9	19.3	23.3	19.3	17.6
All Tests	10.1	4.7	13.1	14.1	11.6	9.4

The results above show that in general Hibernate with Derby embedded is slightly more efficient than OpenJPA with PostgreSQL server in retrieving JPA entity objects from the database.

A huge performance gap has been detected when using JPA element collections with small retrieval size. Comparing the normalized speed of OpenJPA with PostgreSQL database server (0.013) to the normalized speed of Hibernate with Derby embedded database (4.4) reveals that in that case, Hibernate with Derby embedded is 338 times faster than OpenJPA with PostgreSQL server.

Speed comparison of JPA database query operations (normalized score, higher is better)

Retrieval Size =>	Few Entities		Many Entities		Average Score
	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server
Basic Person Test	49.3	failed	6.8	failed	28.1	failed
Element Collection Test	37.6	failed	2.7	failed	20.1	failed
Inheritance Test	24.1	failed	7.6	failed	15.9	failed
Indexing Test	5.3	failed	14.8	failed	10.1	failed
Multithreading Test	39.7	failed	6.1	failed	22.9	failed
All Tests	31.2	failed	7.6	failed	19.4	failed

OpenJPA with PostgreSQL server has failed in 10 tests (see exceptions).

Speed comparison of JPA database update operations (normalized score, higher is better)

Transaction Size =>	Few Entities		Many Entities		Average Score
	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server
Basic Person Test	4.5	4.9	3.2	3.9	3.8	4.4
Element Collection Test	3.9	0.033	3.1	4.6	3.5	2.3
Inheritance Test	4.6	4.8	4.5	4.9	4.5	4.9
Indexing Test	4.6	5.1	5.5	6.0	5.1	5.6
Graph (Binary Tree) Test	2.7	0.57	1.2	0.31	2.0	0.44
Multithreading Test	11.6	22.2	2.6	7.4	7.1	14.8
All Tests	5.3	6.3	3.3	4.5	4.3	5.4

The results above show that in general OpenJPA with PostgreSQL server is slightly more efficient than Hibernate with Derby embedded in updating JPA entity objects in the database.

A large performance gap has been detected when using multithreading with large transaction size. Comparing the normalized speed of Hibernate with Derby embedded database (2.6) to the normalized speed of OpenJPA with PostgreSQL database server (7.4) reveals that in that case, OpenJPA with PostgreSQL server is 2.8 times faster than Hibernate with Derby embedded.

On the other hand, OpenJPA with PostgreSQL server is slower, for instance, when using JPA element collections with small transaction size. Comparing the normalized speed of OpenJPA with PostgreSQL database server (0.033) to the normalized speed of Hibernate with Derby embedded database (3.9) reveals that in that case, OpenJPA with PostgreSQL server is 118 times slower than Hibernate with Derby embedded.

Speed comparison of JPA database removal operations (normalized score, higher is better)

Transaction Size =>	Few Entities		Many Entities		Average Score
	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server
Basic Person Test	3.8	4.6	4.2	5.3	4.0	5.0
Element Collection Test	2.3	0.032	1.5	2.8	1.9	1.4
Inheritance Test	4.0	4.3	4.3	4.6	4.2	4.4
Indexing Test	5.5	8.0	3.6	7.1	4.6	7.5
Graph (Binary Tree) Test	0.74	0.53	0.96	0.55	0.85	0.54
Multithreading Test	5.6	17.4	4.9	9.1	5.3	13.3
All Tests	3.7	5.8	3.3	4.9	3.5	5.4

The results above show that in general OpenJPA with PostgreSQL server is more efficient than Hibernate with Derby embedded in deleting JPA entity objects from the database.

A large performance gap has been detected when using multithreading with small transaction size. Comparing the normalized speed of Hibernate with Derby embedded database (5.6) to the normalized speed of OpenJPA with PostgreSQL database server (17.4) reveals that in that case, OpenJPA with PostgreSQL server is 3.1 times faster than Hibernate with Derby embedded.

On the other hand, OpenJPA with PostgreSQL server is slower, for instance, when using JPA element collections with small transaction size. Comparing the normalized speed of OpenJPA with PostgreSQL database server (0.032) to the normalized speed of Hibernate with Derby embedded database (2.3) reveals that in that case, OpenJPA with PostgreSQL server is 71.9 times slower than Hibernate with Derby embedded.

Comparison of JPA/Database speed - the averages (normalized score, higher is better)

Transaction/Retrieval Size	Few Entities		Many Entities		Average Score
	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server	Hibernate Derby embedded	OpenJPA PostgreSQL server
Basic Person Test	15.5	5.1	6.9	7.5	11.2	6.3
Element Collection Test	10.2	0.72	2.8	4.6	6.5	2.6
Inheritance Test	9.7	4.7	7.7	7.6	8.7	6.2
Indexing Test	6.5	6.3	9.0	9.7	7.8	8.0
Graph (Binary Tree) Test	2.0	0.59	1.7	0.50	1.8	0.55
Multithreading Test	17.3	18.7	7.3	12.2	12.3	15.5
All Tests	10.5	6.0	6.1	7.0	8.3	6.5

The results above show that in general Hibernate with Derby embedded is slightly more efficient than OpenJPA with PostgreSQL server in performing JPA database operations.

A huge performance gap has been detected when using JPA element collections with small transaction/retrieval size. Comparing the normalized speed of OpenJPA with PostgreSQL database server (0.72) to the normalized speed of Hibernate with Derby embedded database (10.2) reveals that in that case, Hibernate with Derby embedded is 14.2 times faster than OpenJPA with PostgreSQL server.

JPA Performance Benchmark (JPAB)