[hibernate-issues] [Hibernate-JIRA] Moved: (EJB-424) Cascading performance problems when session contains many entities

Cascading performance problems when session contains many entities ------------------------------------------------------------------ Key: EJB-424 URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-424 Project: Hibernate Entity Manager Issue Type: Improvement Affects Versions: 3.3.3 Reporter: Yves Galante Attachments: patchCascading.patch, SaveTest.zip, SaveTest_v2.zip When session contains many entities, performence of cascading become very slow. For each collection element the whole persistence context is searched (by StatefulPersistenceContext#getIndexInOwner() and StatefulPersistenceContext#getOwnerId) and its even searched twice when the collection is an indexed collection. This patch optimize cascading operation by caching relation parent-child on a map. eventSource.getPersistenceContext().addChildParent(child, parent); action.cascade(eventSource, child, entityName, anything, isCascadeDeleteEnabled); eventSource.getPersistenceContext().removeChildParent(child); The test case save and flush 10 * 551 objects. Before patch save object with cascading is more slow when session size grows. After patch time of save stay same at each loop. Output of the test case before the patch : Save took 449 ms Save took 669 ms Save took 1042 ms Save took 1464 ms Save took 2481 ms Save took 2741 ms Save took 3807 ms Save took 4344 ms Save took 4975 ms Save took 5251 ms Total took 30906 ms Output after the patch Save took 445 ms Save took 144 ms Save took 164 ms Save took 108 ms Save took 93 ms Save took 93 ms Save took 93 ms Save took 94 ms Save took 91 ms Save took 89 ms Total took 4905 ms