[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-6735) Performance hostpot in FieldInterceptionHelper.JavassistDelegate.isInstrumented(Class)

Performance hostpot in FieldInterceptionHelper.JavassistDelegate.isInstrumented(Class) -------------------------------------------------------------------------------------- Key: HHH-6735 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6735 Project: Hibernate Core Issue Type: Improvement Reporter: Sanne Grinovero Assignee: Emmanuel Bernard Fix For: 4.0.0.next Attachments: HibernateCore Hot spots.tar.gz The method {code}org.hibernate.bytecode.instrumentation.internal.FieldInterceptionHelper.JavassistDelegate.isInstrumented(Class){code} is invoked frequently at runtime, creating a significant performance bottleneck; I'm attaching the profiling report from a synthetic micro benchmark which is unlikely to be representative of a real world case, but able to show a waste of 27% of CPU time in this method only. From previous discussion:{quote}> > This is something we should fix in Core; it should be possible to > associate a "isInstrumented" flag to the Entity, so that we don't need > to check the class hierarchy at each invocation? I think this should > reside in the EntityMetamodel, and the > FieldInterceptionHelper.isInstrumented be invoked only once per type. Yes, I think it's a good idea. We will still need FieldInterceptionHelper.isInstrumented in some situations where the SessionFActory is unknown but that will help in all the common Hibernate operations.{quote}