Open Bug 246393 Opened 20 years ago Updated 2 years ago

Diagonal smooth-scrolling is jerky and slow.

Categories

(Core :: Web Painting, defect)

Product:
Core
Component:
Web Painting
Platform:
x86
Linux
Type:
defect

Tracking

()

People

(Reporter: adam, Unassigned)

References

(
URL
)

Details

(Keywords: perf) 

While smooth-scrolling is pretty performant in either the horizonal or vertical
directions, diagonal smooth-scrolling (as done by tapping, say, right-arrow and
down-arrow repeatedly) really seems very much slower and jerkier on my system,
and takes longer to come to rest.

It's fine with smooth-scrolling turned off.

I'd expect diagonal smooth-scrolling to be roughly comparable in
speed/smoothness/cpu-burn as smooth-scrolling a similar distance horizontally or
vertically.
Right now when you smooth-scroll diagonally, we repaint the bounding box of the
damage areas, which is the whole page. There's no easy way to avoid that.
Ah, I see.  Ouch.

I've had ti uninstall Mozilla 2X because when i take the recent upgrade,
scrolling is Jerky and skidding...Rick
QA Contact: ian → layout.view-rendering
Is this behavior still seen?
Flags: needinfo?(mats)
It's better you ask the reporter or anyone else that commented they reproduced it.
I just don't have time to test old bugs like this, sorry.
Flags: needinfo?(mats)
Component: Layout: View Rendering → Layout: Web Painting
Severity: normal → S3
You need to log in before you can comment on or make changes to this bug.