Santiago Rodriguez wrote a relatively simple program which executes some queries and inserts in a MySQL database through JPA. Four fixed-time tests were done with exactly the same code, just changing the JPA implementation library and the persistence.xml. This article is a response to the lack of information on the net about the performance differences among the 4 most well known Java Persistence API (JPA) implementations: Toplink Essentials, EclipseLink, Hibernate and OpenJPA. Besides results and conclusions, the full test code is also available in case you want to repeat the test yourself. For the tests performed for this article, nothing except JPA was used. No web pages, no web or application server. Just java threads, JPA and MySQL.
Visit : http://terrazadearavaca.blogspot.com/2008/12/jpa-implementations-comparison.html
