on 19 Jun, 2017 07:32 AM
Thanks for quick response.
I analyzed the logs and it looks like the problem is not in the tests, but in the PowerShell scripts that are used to execute them. Each test program/script is run in a subprocess / PS job. The execution time of each job is printed in the log and in most cases it's below 1s. But when you compare it with the timestamp of the log line, it appears that spawning this subprocess/job may take a couple of seconds. It used to be ~3s (average), now it is 9s avg. (not less than 4 sec.!!!).
I have no idea whether this change it is related to the PowerShell itself or some other Windows updates.