Opencv imshow() freezes when updating

Question

For my image processing algorithm I\'m using python / OpenCV. The output of my algorithm shall be updated im the same window over and over again.

However sometimes

Answer 1

Increasing the wait time solves this issue. However in my opinion this is unnecessary time spent on sleeping (20 ms / frame), even though it's not much.

Changing

cv2.waitKey(1)

to

cv2.waitKey(20)

prevents the window from freezing in my case. The duration of this required waiting time may vary on different machines.