1910816 - Js1k demo (https://js1k.com/2014-dragons/demo/1906) flashes/blinks/flickers the whole browser for an instant on load

Status: RESOLVED DUPLICATE of bug 1910868

(Core :: Graphics: Canvas2D, defect)

Description

[Mayank Bansal]

1. Use Nightly on windows. This should have the gpu-canvas backend enable as of today.
2. Go to https://js1k.com/2014-dragons/demo/1906
3. Additional step: Let the tab in #2 remain and open a new tab. Again load https://js1k.com/2014-dragons/demo/1906 into it.

AR: After #2 or #3, there is an instant of flah/blink/flicker of the whole browser
ER: Not so

Bisection:
Bug 1910138 - Disable Direct2D in Nightly. r=jrmuizel,aosmond
Differential Revision: https://phabricator.services.mozilla.com/D217851

Profile: https://share.firefox.dev/46uBY6Y
Profile with graphics preset logging: https://share.firefox.dev/4ftHB9Y

Maybe fallback to skia is slow here?

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

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

Set release status flags based on info from the regressing bug 1910138

:lsalzman, since you are the author of the regressor, bug 1910138, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 3

[Mayank Bansal]

And with gpu-canvas manually enabled, I get this range:

Bug 1829026 - Handle KERN_ABORTED from semaphore_wait. r=aosmond

semaphore_wait and semaphore_timedwait can return KERN_ABORTED, much
like POSIX semaphores can return EINTR, and need to restart their
waits for correct behavior.

Differential Revision: https://phabricator.services.mozilla.com/D195952

Comment 4

[Mayank Bansal]

Attachment: bandicam 2024-07-31 10-14-39-931.mp4

Carefully start looking at the 2 second and the 6 second mark

Comment 5

[Lee Salzman [:lsalzman]]

This seems like a potential dup of bug 1910868. It seems like the fix for that bug fixes this issue for me, but YMMV.

Comment 6

[Mayank Bansal]

Yes, this is fixed by the patch in bug 1910868