CollectionView lagging on start scrolling for Android

[asafgo]

Description

When scrolling a CollectionView, the scrolling at the start is lagging on Android platform.

collectionview.mp4

Steps to Reproduce

Download the repo from here https://github.com/asafgo/MAUI_CollectionView

Version with bug

6.0.408 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android 11

Did you find any workaround?

No

Relevant log output

No response

[jfversluis]

Thanks @asafgo did you also test this on other platforms? Did you see the same there as well? Is there any code that you added which made this behavior happen suddenly? Or maybe some code changes with which you saw a change in this behavior?

[ghost]

Hi @asafgo. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[asafgo]

Hi @jfversluis I wanted to test it on my iPhone but unfortunately I am receiving the error "Could not find any available provisioning profiles for MonkeyFinder on iOS" when trying to deploy to my iPhone.
On Windows Machine there is no problem and CollectionView scrolling is working fine without lagging.

The code I have modified to MonkeyFinder is at class MonkeyService.cs like so
var temp = await response.Content.ReadFromJsonAsync<List<Monkey>>(); for (var i = 0; i < 100; i++) { foreach (var item in temp) { monkeyList.Add(item); } }
in order to create a very large list to be able to see how CollectionView will managed.

[Dreamescaper]

I have noticed that CollectionView creates more elements from ItemTemplate when you start scrolling, probably that causes the lag. Is it possible to add more items initially, so that it wouldn't need to to that on scroll?

[asafgo]

I have just deployed the project to my iPhone SE and CollectionView is working smooth without any lags. so the problem is with Android.

Untitled.mp4

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[homeyf]

Verified this issue with Visual Studio Enterprise 17.6.0 Preview 7.0. Can repro on android platform with above project.
repro project: https://github.com/asafgo/MAUI_CollectionView