This directory contains some very simple performance
code that will compile for multiple CORBA targets.
Currently, the supported targets are:

OmniORB2 Version 2.2.0
OmniBroker Version 2.0b4
Mico Version 0.93b3

Note how very similar, and yet frustratingly different
the various sources are.

To compile, move the appropriate Makefile to 'Makefile'
and type 'make'.

To make performance measurements, start 'MyServer' in one
shell, and run 'time MyClient' in another shell.  MyClient
will make 100K corba invocations.  CPU time is used in
both the client, and the server, while the time command 
measures only the time spent in the client.  However,
the elapsed-time reported is a good indicator for the
total client+server CPU usage.

Note that since this test requires the operatiing system 
to make frequent switchs between processes, a significant
amount of time is spent in the kernel, doing process 
switches.


The following results were obtained on a Pentium 133
w/ Linux 2.0.30 kernel & gcc 2.7.2.1:

CORBA           millisecs    compile time  binary size
Implementation   per call     (seconds)    (kiloBytes)
-------------------------------------------------------
OmniORB2          0.80           26         752
OmniBroker        1.10           70        2100
Mico              4.20           60         102


Clearly, OmniORB2 holds both the raw performance record,
as well as the compile time record.  Note that both 
OmniBroker and OmniORB used statically linked libraries,
while Mico uses a shared library. This results in both
smaller binaries for Mico, as well as possibly affecting 
performance.

-------------------------------------------------------
INTEROPERABILITY:

Each of the three clients were able to talk to each of the 
three servers.  This is as it should be: different versions
of CORBA should eb able to interoperate.

---------------------------
Linas Vepstas October 1997