I did notice that my lazy scenarios are almost 50% slower now, but looking at the sql dumps it appears that we were fetching eagerly even in those scenarios and this (or another JIRA?) seems to have fixed that functional error. Does that seem like something your changes would resolve? Did you run into anything that would cause an eager fetch even when lazy was specified?
I had no intention of "fixing" any lazy loading behavior. The fact that you're seeing different behavior makes me nervous. Can you post details on the entities and the test case so we can determine for sure whether the new or old behavior is correct?
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