maui [Android][MAUI-8.0.7] The CPU always maintains around 20%, even without any operation

Description

When there is a 'CollectionView' with property set to ItemsLayout="HorizontalList", the interface responds very slowly.CPU is always occupied, maintaining around 20%

Steps to Reproduce

Download https://github.com/BaY1251/MauiDebug.git

Open /HorizontalList/HorizontalList.sln
Change configuration to 'Release', and deployment the project
Wait for 5 minutes, do not take any action during this period
Command line input adb shell top -n 1 | findstr "\<com.companyname.horizontallist\> \<PID\>"' to view CPU usage.
Waiting for what you think is a long enough time
Command line input adb shell top -n 1 | findstr "\<com.companyname.horizontallist\> \<PID\>"' to view CPU usage.

Link to public reproduction project repository

https://github.com/BaY1251/MauiDebug.git

Version with bug

8.0.7 SR2

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

8.0.6 SR1

Affected platforms

Android

Affected platform versions

Android7.1

Did you find any workaround?

No response

Relevant log output

No response

Feb 19 '24 02:02 BaY1251

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

Feb 19 '24 15:02 ghost

could not repro
- all tests - 0%-3%
- manual too
TODO: tests on another dev box (Mac x86) with net7.0, net8.0, net9.0
1000 samples - approx 1 sec each
tested
- 2 macs
  - M2
  - x86 i9
- on
  - emulators
  - pixel5 device
    
    I was not able

emulator-mac-m2-net8.0.top.processor.log.txt emulator-mac-m2-net7.0.top.processor.log.txt

repro sample

AppRepro.zip

Mac M2 pixel5 net8.0

crash during start (needs investigation)
- workaround - nuke bin/ obj/

dotnet build \
    ./net8.0/ProjectsStructureTemplate.AppMAUI.DemoSample/ProjectsStructureTemplate.AppMAUI.DemoSample.csproj \
    -t:run \
    -f:net-8.0-android

adb shell top -n 1000 | grep "com.companyname" > pixel5--net8.0.top.processor.log

Could not redirect output to file. Redirecting hangs.

adb shell top -n 1000

Does not even list tested app

adb shell top -n 1000 | grep "com.companyname"

shows around 3% (constant)

20790 u0_a56       10 -10  14G 227M 121M S  1.3   3.0   0:04.22 com.companyname+
20790 u0_a56       10 -10  14G 227M 121M S  1.3   3.0   0:04.22 com.companyname+

Mac M2 emulator net8.0 - OK

dotnet build \
    ./net8.0/ProjectsStructureTemplate.AppMAUI.DemoSample/ProjectsStructureTemplate.AppMAUI.DemoSample.csproj \
    -t:run \
    -f:net-8.0-android

adb shell top -n 1000 | grep "com.companyname" > emulator-2--net8.0.top.processor.log

Mac M2 emulator net7.0 - OK

dotnet build \
    ./net7.0/ProjectsStructureTemplate.AppMAUI.DemoSample/ProjectsStructureTemplate.AppMAUI.DemoSample.csproj \
    -t:run \
    -f:net-7.0-android

adb shell top -n 1000 | grep "com.companyname" > emulator-2--net7.0.top.processor.log

Feb 26 '24 10:02 moljac

@moljac I noticed that my project seems to have been modified, please make sure to use <PackageReference Include="Microsoft.Maui.Controls" Version="8.0.7" /> instead of <PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" />

Or, Can you directly deploy my project? I am certain that the issue introduced in the new version(8.0.7) occurred in Android 7.1, while the old version did not have this issue

Feb 27 '24 01:02 BaY1251

I noticed that my project seems to have been modified,

yes. I have template for multi TFM tests. I tried your sample. There was some processor %, but not 20%.

I will paste logs today.

please make sure to use <PackageReference Include="Microsoft.Maui.Controls" Version="8.0.7" /> instead of <PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" />

I will add those references to my projects.

Or, Can I directly deploy my project?

Can you? I guess you can. I did. Yes there was some % but not 20%.

The reason I use my template is to find possible regressions if any.

I am certain that the issue introduced in the new version(8.0.7) occurred in Android 7.1, while the old version did not have this issue

OK. Good to know. I will test more today.

Feb 27 '24 07:02 moljac

OK. I was able to repro

with

<PackageReference Include="Microsoft.Maui.Controls" Version="8.0.7" />

it is not 20%, but 10% original sample and 12% for my sample.

18801 u0_a190      10 -10  14G 244M 114M S 33.6  12.3  14:57.95 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 33.6  12.3  14:58.96 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 34.0  12.3  14:59.97 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 34.6  12.3  15:00.99 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 34.0  12.3  15:02.03 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 33.3  12.3  15:03.05 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 34.3  12.3  15:04.05 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 34.6  12.3  15:05.08 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 34.3  12.3  15:06.12 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 33.6  12.3  15:07.15 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 34.3  12.3  15:08.16 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 33.6  12.3  15:09.19 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 34.6  12.3  15:10.20 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 34.3  12.3  15:11.24 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 34.0  12.3  15:12.27 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 34.0  12.3  15:13.29 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 33.3  12.3  15:14.31 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 35.0  12.3  15:15.31 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 34.3  12.3  15:16.36 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 34.6  12.3  15:17.39 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 35.3  12.3  15:18.43 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 35.0  12.3  15:19.49 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 34.3  12.3  15:20.54 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 32.6  12.3  15:21.57 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 24.3  12.3  15:22.55 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M R 24.3  12.3  15:23.28 com.companyname+
18801 u0_a190      10 -10  14G 244M 114M S 24.0  12.3  15:24.01 com.companyname+

Feb 28 '24 09:02 moljac

Thank you very much. These data are sufficient to illustrate the issue, as other versions are close to 0%.

PS: 20% was the initial test, with a lot of interface elements to demonstrate slow interface response. Later, I found that the CPU was sufficient to explain the problem, so I will modify the title.

Feb 29 '24 00:02 BaY1251

can repro in Net9 pre 2?

Apr 03 '24 06:04 BaY1251

can repro in MAUI-8.0.20

Apr 10 '24 01:04 BaY1251

This may not be just a problem with CollectionView. I tried using ScrollView+HorizontalStackLayout instead, but the problem still occurred.

Apr 26 '24 01:04 BaY1251

Can you test with the latest nightly build? https://github.com/dotnet/maui/wiki/Nightly-Builds

May 22 '24 14:05 PureWeen

I tested the repro here and I no longer see any ping ponging with the latest nightly

	<PackageReference Include="Microsoft.Maui.Controls" Version="8.0.60-ci.net8.24272.1" />
	<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.60-ci.net8.24272.1" />

May 22 '24 15:05 PureWeen

Yes, fixed by PR #22347

May 23 '24 02:05 BaY1251