max urech Thank you Max. The Introspector in java.beans has a caching mechanism so that a class already introspected is not introspected again. I think it would make sense to add some caching per class, at least per BeanUtil instance so that during the lifetime of a Joran instance, the same BeanUtil can be reused more efficiently. WDYT?

The java.beans.Instrospector caches classes per JVM which is in my opinion very heavy handed.