I built the 4.0.1 branch on a Mac G5 running Mac OS/X and I fired up a
container.
I then timed how long it would take to run /usr/bin/true 100 times:

---------------------------------------------------------------------------
echo start singlejob without delegation: `date` |& tee >>
timingdelegation.$$.log
set i=1
while ($i <= $MAX)
    echo iteration $i of $MAX
    globusrun-ws -submit -q \
        -F https://208.176.63.5:5656/wsrf/services/ManagedJobFactoryService \
        -c /usr/bin/true
    @ i++
end
echo "  end singlejob without delegation:" `date` |& tee >>
timingdelegation.$$.log
---------------------------------------------------------------------------


Here is the output from that experiment:
start singlejob without delegation: Mon Jul 18 12:09:38 CDT 2005
  end singlejob without delegation: Mon Jul 18 12:16:21 CDT 2005

By my calculations it took 6mins,42secs or 402secs to run /usr/bin/true 100
times.
It's been explained to me that running the job as I did above does *not*
trigger
delegation.

I shared these results with Joe Link (author of globusrun-ws) and he was
suprised.
When he was testing globusrun-ws performance on his laptop (an IBM running a
VM)
he was able to run many jobs in a second.

Is the performance that I'm seeing (>4secs/job) because I'm running on a Mac?
Can someone please try the code snipet above on a non-Mac system to see if 
they get the same results?