Hi together,
please allow me a simple question: I am currently preparing a "JPA" workshop for a customer to show the developers the new way of working with JPA persistence in Java EE 5. Just to show one of the advantages of an open standard like JPA I prepared the example to switch between OpenJPA and TopLink Essentials "on the fly" just by changing the "provider" setting in persistence.xml and keeping the sourcecode unchanged. Basically this works fine but what I found out was that when querying for objects with one-to-many relation and accessing the Collection (e.g. person.getAccount()), TopLink is about ten times faster then OpenJPA. Oracle 9 Database is used as DB. Did I miss any tuning parameters or something that could enhance OpenJPA performance? I just can't imagine that there are performance differences for simple "tutorial" application in that order of magnitude! regards, HANS =========================== virtually hanzz... <http://hanzz.zapto.org> http://hanzz.zapto.org (personal) <http://www.cse.dmu.ac.uk/~hansp> http://www.cse.dmu.ac.uk/~hansp (research)
