Shutdown Doesn't Appear Clean #60
Description
When @wbssbw was implementing the performance system it revealed that all threads don't appear properly synchonized in a shutdown scenario requiring him to use the cancellation token.
Ideally this shouldn't be needed as threads shutdown, dropping senders, causing receivers to disconnect, tearing down further threads until the whole program stops. However he reported this is not the case.
This is going to require an investigation into the threading system and determine where the shutdown signal is currently lacking and restructure the code appropriately.