Record the execution time of main function on CNOperationContext
Record the execution time of the main function on CNOperationContext class.
It is executed as a thread on the parallel task queue.
Update e-mail address to send progress.
Support by following commit:
commit dafac0bcb10df40845878865cf9216e5bc6f5394 (HEAD -> master, origin/master, origin/HEAD)
Author: Steel Wheels Project <email@example.com>
Date: Sun Jul 7 11:29:44 2019 +0900
doc: Update document for Operation, OperationQueue.