Potential WebView memory leak on a script-rich application (graph included)

[wojtekzin]

Hi,

we're using QT 5.10 with webview deployed on a linux box with AMD 9260 GPU directly through QT (no Xorg).

What you can see below is a graph of WebView memory consumption on a system with a continuous usage of the application that's running inside it. The app is rich - it's a game that continously runs inside webview through qtwebenengine (which does not show any signs of a memory leak). It does a lot of JS executions, uses shaders and webgl through PIXI JS.

Below you can see the same webview application but the site that's loaded does not include any "active" JS (meaning - it does not execute any meaningful scripts .e.g shows an image)

Where should we look for the memleak? What would be the best way to debug it?

[sierdzio]

Have you tried some newer version of Qt? Perhaps it is fixed already.

[wojtekzin]

Unfortunately upgrading is not an option right now as we're using buildroot-based embedded linux and it comes with a fixed version of QT and other dependencies.

What's worth mentionin is that we were getting the same memory leak on QT version 5.6.

[wojtekzin]

Not sure how to mark is as "solved" but upgrading to 5.11 solved the problem but incured additional problems. However 5.11 does not produce a memory leak anymore.

[aha_1980]

@wojtekzin said in Potential WebView memory leak on a script-rich application (graph included):

Not sure how to mark is as "solved"

The button "Topic Tools" contains that option. Thanks for reporting back.

[JonB]

@wojtekzin

upgrading to 5.11 solved the problem but incured additional problems

Don't mean to burst your bubble, but I believe I have seen posts stating that 5.12 is a better release to go for than 5.11, was 5.12 not suitable for you?