UWP: Webview: Memory Leak

[csk1nner]

Description

Using Xamarin.Forms (3.4.0.1008975), for UWP (windows 10) the webview control will take more and more memory space until it crashes the application

Steps to Reproduce

1. Create a simple Xamarin.Forms application where page A navigates to page B that encapsulates a webview
2. Run the application and note the memory in Task Manager that the application is consuming
3. Navigate to the page that contains the webview. Notice that Task Manager is increasing the memory footprint of the application.
4. Navigate back to the root (page A). Notice that the memory footprint in task manager is not fully recycled.
5. Repeat steps 3 & 4 until application crashes

Expected Behavior

The webview control should closely mimic the resource allocation of Edge browser

Actual Behavior

After three or four navigation cycles (depends on webpage) the application crashes.

Basic Information

• Version with issue: 3.4.0.1008975
• Last known good version:
• IDE: Visual Studio 2017
• Platform Target Frameworks:
  • iOS:
  • Android:
  • UWP: 17134
• Android Support Library Version:
• Nuget Packages:
• Affected Devices:
  UWP (Windows 10)

Screenshots

http://dynamiconnections.com/downloads/screenshot.png

Reproduction Link

http://dynamiconnections.com/downloads/navigationsample.zip

[csk1nner]

Hello there!

Hope you are having a good day. Any news on this? I'm curious to know if there is a work around for this.

Cheers,

Caleb

[PureWeen]

Confirmed

[csk1nner]

Thanks mate!

[cheles]

hi @samhouts. any updates on this? it looks like this was reported on UWP standalone apps too, not only XF and it looks like webview controller is leaking some memory in Back/Forward stack.

[CannoliSquid]

Any updates on this issue?

[cheles]

Just an update that might impact XF too.
We released UWP 6.2.9 NuGet update with huge improvements in memory handling and GC calls while targeting >=RS3. The complete release notes are here: https://github.com/microsoft/dotnet/blob/master/releases/UWP/net-native2.2/README.md
@csk1nner can you try to update everything to latest and see if you still repro memory leak while navigating between pages?

[csk1nner]

The memory leak is still in place. Same issue. Massive increase in memory on UWP. Android and IOS work fine.

[cheles]

my tests showed memory handling improvements. Are you sure you've targeted >=RS3? or else, can you share a repro?

[csk1nner]

Hello there,

Spun up a fresh tabbed xamarin.forms app and experienced the same problem. Added a webview control to the ItemDetailPage and was able to get the memory leak to occur. Please see attached code. Using the latest updates with pre-releases. Problem is occurring on UWP.

Please let me know what to change up to get this working.

Cheers,

Caleb

MemoryTest.zip

[csk1nner]

One more thing. I think this issue has something to do with video players. When I browse to a somple website like: http://www.xamarin.com/ - There are no problems. Complex (normal news sites) crash this.

Cheers,

Caleb