The performance on the calendar-app on Android seems low.

I am opening the month view, opening a calendar-item, I go back to the month view and it is again re-loading which takes up to 5 seconds, which is quite annoying. Compared to e.g. Google Calendar the items load way quicker e.g. 1 second.

Is there any chance, I am using the calendar in a wrong way causing this issue or is that something that could be improved?