1263403 - Heavy checkerboarding in /r/spacex compared to none in Chrome (possibly due to slow Skia FillRect)

Status: NEW

(Core :: Graphics, defect, P3)

Description

[Benoit Girard (:BenWa)]

Seeing a lot of checkerboarding while browsing several reddit. Checking in Chrome often shows no checkerboarding at all.

Here's an example:
https://www.reddit.com/r/spacex/comments/4dycyv/the_first_stage_has_landed_successfully_on_ocisly/

Perhaps it's partly that peak velocity is lower in Chrome. It takes me ~1 second to scroll top to bottom in FF and ~4 seconds in Chrome. But I also see checkerboarding when panning at lower speed.

Comment 1

[Benoit Girard (:BenWa)]

Profile is showing 300ms in rasterize times within Skia/FillRect:

http://people.mozilla.org/~bgirard/cleopatra/#report=d7397ccd6638dd36d7174f272b39b0426d32f172

Comment 2

[Kartikaya Gupta (email:[e-mail])]

Tossing this to Graphics to see if we can improve the Skia FillRect code.

Comment 3

[Gregory Pappas [:gregp]]

Reporter, are you still experiencing this issue?

Comment 4

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

Clear a needinfo that is pending on an inactive user.

Inactive users most likely will not respond; if the missing information is essential and cannot be collected another way, the bug maybe should be closed as INCOMPLETE.

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