I am trying to track down why I am getting poor UI performance when 
dragging a connected morph around.  The use of spyOn and 
TimeProfileBrowser both time the execution of a block.  I could use 
these with code that executes only once at some point in the process, 
but that almost requires that I know where the issue is before I start. 
  In Java environments the profilers support timing all activity in a 
session.  Is there something in Squeak that allows this type of system 
wide monitoring?

Michael