roboRIO-5893-FRC:~$ # on a 2017 roboRIO image
roboRIO-5893-FRC:~$ cat test.py
import hal
import sys
import time
import timeit
import threading

def timer(): return timeit.timeit(hal.observeUserProgramTest)

def main():
  threads = [threading.Thread(target=timer) for _ in range(10)]

  for t in threads: t.start()

  for t in threads: t.join()

if 'once' in sys.argv:
  print(timer())
else:
  main()
roboRIO-5893-FRC:~$ time python3 test.py

real    9m31.739s
user    3m40.460s
sys     7m40.210s
roboRIO-5893-FRC:~$ time python3 test.py once
35.66481052600011

real    0m37.715s
user    0m12.780s
sys     0m13.260s