We recently took some time to review the start time of Neptune3 again. Even though, we talk about relatively short time of 2-4 seconds for a meanwhile large system, we have to know what that time consists of.

It turned out that the problem reported in QTBUG-74871 causes the most time lost on startup when multiple physical screens are attached. The startup time goes from 2-4s to 600-800ms when only one screen is attached and used