Since standard does not have the built in monitor, one or
both of the
third party tools, (SeeFusion and FusionReactor) provide
great
monitoring features that can point out bottle necks and poor
preforming
code. They would show the threads piling up behind this
single thread
point, if that is what is happening.
They both have trials as well as very low costs so that would
be my
first sugestion.