Comparison of OpenJPA with HSQLDB embedded vs OpenJPA with H2 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
	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server
Basic Person Test	13.3	3.7	6.9	2.2	10.1	2.9
Element Collection Test	8.6	2.6	5.3	1.5	7.0	2.1
Inheritance Test	12.2	4.5	5.8	2.0	9.0	3.2
Indexing Test	16.7	7.3	9.1	3.6	12.9	5.4
Graph (Binary Tree) Test	6.1	1.1	7.3	0.84	6.7	0.97
Multithreading Test	26.8	7.7	7.0	4.2	16.9	5.9
All Tests	13.9	4.5	6.9	2.4	10.4	3.4

The results above show that in general OpenJPA with HSQLDB embedded is much more efficient than OpenJPA with H2 server in persisting JPA entity objects to the database. Comparing the normalized speed of OpenJPA with H2 database server (3.4) to the normalized speed of OpenJPA with HSQLDB embedded database (10.4) reveals that in these tests, OpenJPA with HSQLDB embedded is 3.1 times faster than OpenJPA with H2 server.

A large performance gap has been detected when using graphs of objects with large transaction size. Comparing the normalized speed of OpenJPA with H2 database server (0.84) to the normalized speed of OpenJPA with HSQLDB embedded database (7.3) reveals that in that case, OpenJPA with HSQLDB embedded is 8.7 times faster than OpenJPA with H2 server.

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

Retrieval Size =>	Few Entities		Many Entities		Average Score
	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server
Basic Person Test	21.8	2.9	30.1	7.6	25.9	5.2
Element Collection Test	0.0068	0.0022	4.5	1.9	2.2	0.93
Inheritance Test	0.0025	0.013	2.0	4.0	0.98	2.0
Indexing Test	22.1	4.1	43.6	8.8	32.9	6.5
Graph (Binary Tree) Test	2.1	0.38	2.1	0.49	2.1	0.44
Multithreading Test	20.9	5.9	23.5	14.0	22.2	10.0
All Tests	11.1	2.2	17.6	6.1	14.4	4.2

The results above show that in general OpenJPA with HSQLDB embedded is much more efficient than OpenJPA with H2 server in retrieving JPA entity objects from the database. Comparing the normalized speed of OpenJPA with H2 database server (4.2) to the normalized speed of OpenJPA with HSQLDB embedded database (14.4) reveals that in these tests, OpenJPA with HSQLDB embedded is 3.4 times faster than OpenJPA with H2 server.

A large performance gap has been detected when using simple basic entities with small retrieval size. Comparing the normalized speed of OpenJPA with H2 database server (2.9) to the normalized speed of OpenJPA with HSQLDB embedded database (21.8) reveals that in that case, OpenJPA with HSQLDB embedded is 7.5 times faster than OpenJPA with H2 server.

On the other hand, OpenJPA with HSQLDB embedded is slower, for instance, when using class inheritance in the object model with small retrieval size. Comparing the normalized speed of OpenJPA with HSQLDB embedded database (0.0025) to the normalized speed of OpenJPA with H2 database server (0.013) reveals that in that case, OpenJPA with HSQLDB embedded is 5.2 times slower than OpenJPA with H2 server.

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

Retrieval Size =>	Few Entities		Many Entities		Average Score
	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server
Basic Person Test	2.8	3.7	0.91	1.0	1.9	2.4
Element Collection Test	1.4	2.0	0.95	1.2	1.2	1.6
Inheritance Test	2.4	2.8	1.3	1.1	1.8	2.0
Indexing Test	15.4	3.8	34.3	7.5	24.9	5.7
Multithreading Test	1.4	0.98	0.53	1.0	0.95	1.0
All Tests	4.7	2.7	7.6	2.4	6.1	2.5

The results above show that in general OpenJPA with HSQLDB embedded is more efficient than OpenJPA with H2 server in executing the tested JPA queries. Comparing the normalized speed of OpenJPA with H2 database server (2.5) to the normalized speed of OpenJPA with HSQLDB embedded database (6.1) reveals that in these tests, OpenJPA with HSQLDB embedded is 2.4 times faster than OpenJPA with H2 server.

A large performance gap has been detected when using database indexes with large retrieval size. Comparing the normalized speed of OpenJPA with H2 database server (7.5) to the normalized speed of OpenJPA with HSQLDB embedded database (34.3) reveals that in that case, OpenJPA with HSQLDB embedded is 4.6 times faster than OpenJPA with H2 server.

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

Transaction Size =>	Few Entities		Many Entities		Average Score
	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server
Basic Person Test	12.0	3.0	5.3	2.0	8.6	2.5
Element Collection Test	0.017	0.0078	3.7	1.9	1.8	0.94
Inheritance Test	0.0098	0.034	2.0	2.8	0.99	1.4
Indexing Test	9.3	2.8	5.5	3.2	7.4	3.0
Graph (Binary Tree) Test	2.5	0.79	1.6	0.43	2.1	0.61
Multithreading Test	20.0	7.0	3.7	2.5	11.8	4.8
All Tests	7.3	2.3	3.6	2.1	5.5	2.2

The results above show that in general OpenJPA with HSQLDB embedded is more efficient than OpenJPA with H2 server in updating JPA entity objects in the database. Comparing the normalized speed of OpenJPA with H2 database server (2.2) to the normalized speed of OpenJPA with HSQLDB embedded database (5.5) reveals that in these tests, OpenJPA with HSQLDB embedded is 2.5 times faster than OpenJPA with H2 server.

A large performance gap has been detected when using simple basic entities with small transaction size. Comparing the normalized speed of OpenJPA with H2 database server (3.0) to the normalized speed of OpenJPA with HSQLDB embedded database (12.0) reveals that in that case, OpenJPA with HSQLDB embedded is 4.0 times faster than OpenJPA with H2 server.

On the other hand, OpenJPA with HSQLDB embedded is slower, for instance, when using class inheritance in the object model with small transaction size. Comparing the normalized speed of OpenJPA with HSQLDB embedded database (0.0098) to the normalized speed of OpenJPA with H2 database server (0.034) reveals that in that case, OpenJPA with HSQLDB embedded is 3.5 times slower than OpenJPA with H2 server.

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

Transaction Size =>	Few Entities		Many Entities		Average Score
	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server
Basic Person Test	21.3	3.2	15.7	2.2	18.5	2.7
Element Collection Test	0.011	0.0060	2.9	0.88	1.5	0.44
Inheritance Test	0.0070	0.030	3.5	3.1	1.8	1.6
Indexing Test	28.8	6.5	15.2	3.6	22.0	5.1
Graph (Binary Tree) Test	2.9	0.73	3.6	0.75	3.2	0.74
Multithreading Test	26.0	7.6	19.6	5.2	22.8	6.4
All Tests	13.2	3.0	10.1	2.6	11.6	2.8

The results above show that in general OpenJPA with HSQLDB embedded is much more efficient than OpenJPA with H2 server in deleting JPA entity objects from the database. Comparing the normalized speed of OpenJPA with H2 database server (2.8) to the normalized speed of OpenJPA with HSQLDB embedded database (11.6) reveals that in these tests, OpenJPA with HSQLDB embedded is 4.1 times faster than OpenJPA with H2 server.

A large performance gap has been detected when using simple basic entities with large transaction size. Comparing the normalized speed of OpenJPA with H2 database server (2.2) to the normalized speed of OpenJPA with HSQLDB embedded database (15.7) reveals that in that case, OpenJPA with HSQLDB embedded is 7.1 times faster than OpenJPA with H2 server.

On the other hand, OpenJPA with HSQLDB embedded is slower, for instance, when using class inheritance in the object model with small transaction size. Comparing the normalized speed of OpenJPA with HSQLDB embedded database (0.0070) to the normalized speed of OpenJPA with H2 database server (0.030) reveals that in that case, OpenJPA with HSQLDB embedded is 4.3 times slower than OpenJPA with H2 server.

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

Transaction/Retrieval Size	Few Entities		Many Entities		Average Score
	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server	OpenJPA HSQLDB embedded	OpenJPA H2 server
Basic Person Test	14.3	3.3	11.8	3.0	13.0	3.1
Element Collection Test	2.0	0.93	3.5	1.5	2.7	1.2
Inheritance Test	2.9	1.5	2.9	2.6	2.9	2.0
Indexing Test	18.5	4.9	21.6	5.4	20.0	5.1
Graph (Binary Tree) Test	3.4	0.75	3.7	0.63	3.5	0.69
Multithreading Test	19.0	5.9	10.9	5.4	14.9	5.6
All Tests	10.2	2.9	9.2	3.2	9.7	3.0

The results above show that in general OpenJPA with HSQLDB embedded is much more efficient than OpenJPA with H2 server in performing JPA database operations. Comparing the normalized speed of OpenJPA with H2 database server (3.0) to the normalized speed of OpenJPA with HSQLDB embedded database (9.7) reveals that in these tests, OpenJPA with HSQLDB embedded is 3.2 times faster than OpenJPA with H2 server.

A large performance gap has been detected when using graphs of objects with large transaction/retrieval size. Comparing the normalized speed of OpenJPA with H2 database server (0.63) to the normalized speed of OpenJPA with HSQLDB embedded database (3.7) reveals that in that case, OpenJPA with HSQLDB embedded is 5.9 times faster than OpenJPA with H2 server.

JPA Performance Benchmark (JPAB)