cygwin is very slow, even to return a command prompt with SEP 11.0.6 installed. a simple carriage return causes a 10 second delay for a command prompt to reappear. i have narrowed it down to the 'proactive threat protection'. if i disable it, all is normal. i have tried adding some applications (bash.exe, e.g.) into the centralized exceptions with no success.
thanks for your help.