bi-pass JacORB interceptors for purely local invocations

SourceForge Submitter: marklittle .
I registered the following issue
(http://www.jacorb.org/cgi-bin/bugzilla/show_bug.cgi?
id=526) with JacORB bugzilla a couple of weeks ago, but
no response so far. I think it's sufficiently important to
register here too in case you are able to do something
for JBoss.

In the current implementation of JacORB (2.2), if I
register an interceptor with the ORB, then
it appears that all invocations to all objects go through
that interceptor,
even if they are co-located with the invoker. I
understand that rational given
the PI specification and the original intention behind
that work: to make
local invocations and remote invocations similar.

However, most ORBs provide a way of doing a local, no-
interceptor
optimization. The JDK 1.4 ORB is one example (though
that takes the other
extreme and won't invoke interceptors on any local
object).

Orbix 2000, for example, supports multiple ORBs and
POAs within the same VM,
and interceptors are registered on a per-ORB basis, not
a per VM basis as
appears to be the case with JacORB. You can also turn
on local optimizations
for the individual ORBs.

The reason for asking for this optimization is
performance. With a very simple
test, where the interceptor does nothing, we see a 66%
degredation in
performance for local calls. For example, with no
interceptors we can get > 3000 invocations, whereas
with a "null" interceptor this is around 1000.