Just to be clear I’m not the one trying to prove my point giving a random duration without any information 
I’m sorry that you do not like my explanation and kept pushing.
0.3 sec per query for 500 movies and 2000 episodes (The medium library size from analytics) is 13 minutes added to sync time. 0.3 is the medium duration for a query on a low end Android device with non high perf wifi.