title: Spyder profiler times don't add up (totalTime =/= localTime + sub-function totalTime)
body: <p><a href="https://i.stack.imgur.com/W5a9P.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/W5a9P.png" alt="enter image description here" /></a></p>
  <p>So the total time of optimizeVoxels = 1.86 min * 60sec/min = 111 seconds.</p>
  <p>However, this doesn't match the profiler results from the local time and sub-functions.
  localTime(optimizeVoxels) = 24.93 ms = 0.024 sec</p>
  <p>subFunction total times = 28.26+20.40+13.67+12.46+4.63+0.43146+0.23991+0.07237+0.00757+0.00191 = 80.173 seconds, and even if we add 0.024 to this, it's still just 80.197.</p>
  <p>The gap between 80.197 and 111 seconds is extremely large from my perspective -- any ideas what the discrepancy could be here?</p>