[jboss-dev-forums] [Design of EJB 3.0] - Re: Unnecessary read before update with merge()

[epbernard]

To expand it a bit. If you expect mostly updates from your graph, saveOrUpdate is good, if you expect mostly unchanges objects in your graph, merge is good.

Hibernate optimize things under the hood (merge profile / batch update), the different does not matters in most cases

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