UI causing huge performance drop on 2017.3.0f3 - Profiler blames UGUI.Rendering.UpdateBatches

Hi all,

I have just migrated my project to 2017.3 but i am unable to move on to deployment as there is a big performance issue, FPS dropped from 30 fps (limited on purpose) to 15-20fps.

On the profiler it shows that most of the time/processor is on UGUI.Rendering.UpdateBatches as shown here;



I have found on the forum that the problem existed on 2017.2 but should have been fixed on 2017.3, but, at least for me, it is not:

https://forum.unity.com/threads/ugu...-regression-continuation.501780/#post-3287166

https://forum.unity.com/threads/ugui-rendering-updatebatches-performance-problem.504553/

Is anyone else facing it? I saw that the problem was supposed to be on ContentFitter with LayoutGroup, which I have several on same GO in the scene.

@LeonhardP, do you have any update on this? I saw on the other posts that you were handling the issue, but the threads ended with no final confirmation of the solution.

I really appreciate any help, solution, workaround or nice words.

Thanks in advance,
Fernando

 

I guess many people using UI went back to 2017.2 due to ios crashs
https://forum.unity.com/threads/2017-3-0f3-ios-build-crashes-all-the-time.509586/

Moreover, each new unity version cause performance issue since a while
https://issuetracker.unity3d.com/is...decrease-in-unity-5-dot-6-compared-to-5-dot-4

 

We are experiencing performance problems in UpdateBatches as well.
Any tips on how to reduce the cost would be greatly appreciated. Is it caused by something moving and needing to be recalculated?

 

Check the links i've added on my initial message, besides it, rolling back to 5.6.3 made the app back to its normal fps. So it really seems to be a problem with 2017 versions, as stated on the links too.

 

Up! Anyone from Unity team? Any help appreciated. @LeonhardP can you give me an update on it? I saw your posts on the beta forum but no update on the issue tracker: https://issuetracker.unity3d.com/issues/content-size-fitter-causes-large-performace-slowdown

 

I experience massived performance hits related to ContentSizeFitter (albeit in combination TextMeshPro) as well. In the end, I ended up writing scripts that manually managed the width and placements of labels based on content character length instead. It's definitely more work and the result isn't as nice - but at least I don't encounter 10ms processing spikes every time I update the UI.

 

Thanks George! The issue seems to be ContentSizeFitter, at least this is the cause discussed on the beta forum. Unfortunately there is no reply from anyone from Unity and the issue tracker keeps saying fixed in a future release: https://issuetracker.unity3d.com/issues/content-size-fitter-causes-large-performace-slowdown

It upsets me a lot, the issue may exist but not lost as this one.

 

One improvement that we discovered was to switch to screen space overlay from camera space canvases. Unfortunately that disables MSAA which we use with our SVG assets.
We still get heavy hiccups every time something changes, but before we were getting the hiccups every frame.
It would be nice if camera canvases didn't cause batches to be updated each frame or if screen space overlay canvases supported MSAA