Diagonal smooth-scrolling is jerky and slow.

NEW
Unassigned

Status

()

15 years ago
4 months ago

People

(Reporter: adam, Unassigned)

Tracking

({perf})

Trunk
x86
Linux
Points:
---

Firefox Tracking Flags

(Not tracked)

Details

(URL)

(Reporter)

Description

15 years ago
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.
(Reporter)

Comment 2

15 years ago
Ah, I see.  Ouch.

Comment 3

14 years ago
I've had ti uninstall Mozilla 2X because when i take the recent upgrade,
scrolling is Jerky and skidding...Rick
Comment hidden (spam)
QA Contact: ian → layout.view-rendering
Assignee: roc → nobody
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)
(Assignee)

Updated

4 months ago
Component: Layout: View Rendering → Layout: Web Painting
Product: Core → Core
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