This example takes about 6 seconds to get all the uploads running as
they are staged, and then each upload takes a while to get to full speed
because that is a function of the senders TCP stack. So the smoothed
total transfer rate lags as well, and the whole thing doesn't start to bloat
out until we get to max speed.
There is an upload duration preference that can increase the total time
upload or download takes but people already have no patience and
close the tab when they start seeing decent upload numbers,
so increasing it just makes the quit rate higher still. For the quitters
we get no results at all, other than they quit before the end of the test.
thanks