Release 6.6RC1 question related to Kryo

Are we implementing Kryo serialization instead of ellipseLink?
It seems it is going to improve performance, I was reading this blog… http://java-persistence-performance.blogspot.ca/2013/08/optimizing-java-serialization-java-vs.html

For an existing project, do we have to do anything to start using Kryo or it will be used by the Studio for both new and existing projects by default?

Kryo is used for serialization when data is passed between middleware and client tier. It will be used by default as soon as you upgrade your project to 6.6 (and for new projects on 6.6 of course). You can switch back to standard Java serialization using the cuba.serialization.impl application property.

Thanks
It’s working without any trouble