1420879 - Scrolling gets janky after a few days of the browser running

Status: RESOLVED INACTIVE

(Core :: Performance: General, defect)

Description

[Asa Dotzler [:asa]]

This is a profile of janky scrolling on Twitter. I don't notice it until the browser's been running for a few days. https://perfht.ml/2n8v9pS Tested on a 57 release build on windows 10

Comment 1

[Ben Kelly [:bkelly, not reviewing]]

Parent main thread is super busy doing:

NtUserPeekMessage

Which calls into stuff like:

[thunk]:CWmTouchContext::`vector deleting destructor'`adjustor{24}' 

See:

https://perfht.ml/2k3mkMX

Aaron, is this a11y hook stuff?

Comment 2

[(No longer employed by Mozilla) Aaron Klotz]

That code lives in ninput.dll, which according to MSDN is for gesture detection and such.
https://msdn.microsoft.com/en-us/library/windows/desktop/hh448840(v=vs.85).aspx

Comment 3

[Ben Kelly [:bkelly, not reviewing]]

Hmm, ok.  Not sure where to put that then.

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

This bug was moved into the Performance component.

:asa, could you make sure the following information is on this bug?

• For slowness or high CPU usage, capture a profile with http://profiler.firefox.com/, upload it and share the link here.
• For memory usage issues, capture a memory dump from about:memory and attach it to this bug.
• Troubleshooting information: Go to about:support, click "Copy raw data to clipboard", paste it into a file, save it, and attach the file here.

If the requested information is already in the bug, please confirm it is recent.

Thank you.

Comment 5

[Dave Hunt [:davehunt] [he/him] ⌚BST]

With no answer from the reporter, we don’t have enough data to reproduce and/or fix this issue. Please reopen or file a new bug with more information if you see it again.