CollectionView slow/jittering scroll

[angelru]

Description

When there is a complex layout Scroll does not work efficiently.

Steps to Reproduce

I have this layout, as you can see I have used the recommended bindings OneTime and CompressedLayout.IsHeadless="True".

ItemSizingStrategy has to be in mode: MeasureAllItems. Each element can have a different height.

There are like 30-40 elements, the Scroll is unacceptable, both in debug/release mode. Thus, the application cannot be released to production.

I don't know if I can improve my design, but i can't get it. Any help is welcome.

Link to public reproduction project repository

https://github.com/angelru/CvSlowJittering

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android 12

Did you find any workaround?

No response

Relevant log output

No response

[LennoxP90]

have you tried compiling using AOT?

<RunAOTCompilation>true</RunAOTCompilation>
<AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>

you app size will be larger but AOT should fix performance issues

[angelru]

have you tried compiling using AOT?

<RunAOTCompilation>true</RunAOTCompilation>
<AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>

you app size will be larger but AOT should fix performance issues

the improvement in Scroll is very small, it's still very, very inefficient.
Also, often when I'm scrolling all the time, there comes a time when the application becomes slower and more unstable.

[angelru]

@LennoxP90
Test my layout with about 40 elements and see how it performs.

[mohachouch]

@angelru Can you try with the same item height if the scroll is smooth

[angelru]

@angelru Can you try with the same item height if the scroll is smooth

the same issue

[matmork]

Have you tried changing to a ListView?
also try this Sharpnado.CollectionView

Hi @angelru. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

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.

[angelru]

@jsuarezruiz
I already put the repository in the problem description
https://github.com/angelru/CvSlowJittering

[angelru]

@mohachouch
With my provided example, were you able to see the lag?