When an application looks up a remote bean that is co-located in the same JVM,
the copying of that object reference (to preserve the pass-by-value semantics)
can be slower in 9.0 than in 9.1. This will depend on the internal references
held by the bean, and whether those references have classes that contain either
native methods or finalizers. If that is the case, copying of the object happens
over the slow ORBStreamObjectCopierImpl path.
Replacing ORBStreamObjectCopierImpl with JavaStreamCopierImpl doesn't really
help in our tests.