Performance impact of using aop

Question

We have started to use spring aop for cross cutting aspects of our application (security & caching at the moment).

My manager worries about the performance impa

Answer 1

Have you ever thought about an AOP tools that adding aspects to object at runtime when you need? There is one for .net "Add Aspects to Object Using Dynamic Decorator" (http://www.codeproject.com/KB/architecture/aspectddecorator.aspx). I believe you can write a similiar one for Java.