Stunner - Performance issues on MAC

Some performance issues have been identified when using the new process designer (Stunner) on Mac.

Goals:

• Identify the concrete Mac architectures/versions/configurations that are facing the longest delays
• Reproduce the environment for analysis and debug
• Fixes

Notes:

• It seems not all MAC are affected in same way
• The worst case results in delays for about 10-15sec just when clicking on or trying to move some node (task, event)
• This document is intended to collect some feedback about this issue