[jboss-dev-forums] [JBoss Microcontainer Development] - Re: New features in classloading

[adrian@jboss.org]

"david.lloyd at jboss.com" wrote : Do any of these changes have negative performance implications?  For example it looked like the changes for JBCL-128 might introduce some significant overhead.  Might be worth doing some before/after profiling just in case?

It's only got extra overhead if you install a handler and then it depends upon what 
the handler does.

I assume the one you are talking about is the ClassFoundHandler.

The only additional processing for no handlers are a few list == null checks
at the policy, domain and system levels.

The use case we are going to implement is for the Lazy Activation feature in OSGi.

In that case, you install a handler when you create the classloader, but then remove
it once the first class is loaded. So there is only overhead for one classloading request
and that is to implement the desired feature - i.e. start the services associated with
deployment.

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