It sounds like a new way of speeding up of build life cycle https://martinfowler.com/articles/rise-test-impact-analysis.html
Here is a great article with list of tips to tune Java persistence https://vladmihalcea.com/2016/06/28/14-high-performance-java-persistence-tips/
First of all thanks to organizers for such a great event and especially for the ability to free and almost instantly to access session recordings.
Here are some my takeaways to deep dive further.
The most interesting theme for me was attention to security, this topic was important and is becoming more and more important nowadays. So there are several related sessions to check out:
There was also huge attention to data streaming and related architectures
One more important point of software development is documentation and there was also attention to it:
Here is a link Intro to RxJava
Recently found an nice article with explanation of 8 fallacies of distributed applications enjoy – http://www.rgoarchitects.com/Files/fallacies.pdf
Here is a brief overview of the model itself – Richardson Maturity Model steps toward the glory of REST