I tried to migrate from 4.3.11 to 5.0.0 Final, but the time needed for mappings during start-up has dramatically increased.
In 4.3.11 takes 2 seconds, and in 5.0.0 Final needs 8-9 seconds.
I'm using plain Java SE (I do not use Spring or other framework).
I updated the code, I took the code from the tutorial
I made several tests modifying my configuration options with no luck
I did a deep debugging and the most time consuming call was
in jaxb() function from org.hibernate.boot.jaxb.internal.AbstractBinder
Debug for 4.3.11
Debug for 5.0.0 Final
Hibernate ORM 5.0.0 Final, MySQL 5.6