I've noticed MetamodelImpl.getImplementors [1] method is invoked whenever a criteria is executed with list [2], getImplentors is iterating over all entity persisters available (>600 in my model) to resolve the implementors for a given class name, finally this causes a considerable overhead.

Given the implementors for a concrete class name would always be the same, wouldn't it be possible/make sense to cache them so that they are only computed once?

---
[1] https://github.com/hibernate/hibernate- ... .java#L544
[2] https://github.com/hibernate/hibernate- ... java#L1863

Makes a lot of sense. Please open a Jira issue and add a link to this forum thread, and then I'll forward it further to our team so we can discuss what's the best approach to solving it.

I've reported it: https://hibernate.atlassian.net/browse/HHH-11495

Thank you