Unsolved Why qml using more memoy on mobile devices?

[mmjvox]

why qml using more memoy in ios and android?
for example my app in desktop uses about 200MB memory but in ios uses about 380MB.
at first I thought it was a problem with this app only, i tried again more examples, but the result was almost the same.

This is especially true in graphical effects
Suppose we have a listview that contains items with rounded photos and shadows...
it is lagy and uses more memory in ios and andoid , But there is no problem on desktop platforms even if they are very weak