I have hibernate integrated with spring. The number of entities (tables + views) is 574 (yes, I know this is a big number but this is a real application, not a hello world with hibernate). We use one maping file per entity (because 600K+ of xml is unwieldy). Everything moves very slowly. Please apply some kind of cache so that the interface lag / unresponsiveness will happen only the first time. Or better yet, cache everything needed when creating a hibernate facet and assigning a datasource. Issues part of this meta-issue: IDEA-15662 IDEA-15663 IDEA-15665 IDEA-15669