UGUI is working too slow on iOS builds after update to Unity 5.2.x

Question

Hello guys, We are working on complex mobile game and we almost ready to release. We have some critical IL2CPP issues on 5.1.3p3 that were fixed in 5.2. But UGUI in 5.2.x version is working too slow than 5.1.3 on mobile devices (iPad mini 3rd gen, iPad 4, etc.). Lags are very noticeable in scrollview – in Unity 5.1.3 dragging of scroll content is very smooth, but on Unity 5.2.x (including last patch 5.2.1p1) it's very dirty and laggy.

So we can't release game on 5.1.3 due to IL2CPP crashes, but we also can't bear these UI lags on very popular devices.

The main question - for what reason this may happen? I didn't found bug in a public bug tracker.

Answer 1

Answer by hytka81 · Oct 02, 2015 at 06:52 PM

I have not tried scrollview with older versions of Unity than my current 5.2.1p1 but at least in this version the scrollview seems to be very slow and laggy even with only very little content, so I hope this will be fixed soon. I'm using Grid Layout Group for stacking list items vertically and also Content Size Fitter to fit the content (Horizontal and Vertical Fit set to Min Size).

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UGUI is working too slow on iOS builds after update to Unity 5.2.x

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