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

When I used it, I didn't - but then my application isn't your application.

If you use it for calls which are used in a very tight loop, there's the opportunity for a significant performance hit. If it's just used to check security once per request and cache various things, I can't see how it's likely to be significant - but that's why you should profile and benchmark your app.

I realise that "measure with your app" probably isn't the answer you were looking for, but it may well be the one you guessed you'd get :)