Closed Bug 690623 Opened 13 years ago Closed 11 years ago

NHL website's use of -moz-linear-gradient causes jerky scrolling

Categories

(Core :: Graphics, defect)

Product:
Core
Component:
Graphics
Platform:
x86_64
Windows 7
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED FIXED

People

(Reporter: lh.bennett, Unassigned)

References

(
URL
)

Details

(Keywords: perf, Whiteboard: [Snappy:p2]) 

NHL.com
http://cdn.nhle.com/nhl/css/_icev3.min.css?v=4.48 (Line 15)
background-image: -moz-linear-gradient(-45deg, #222222 25%, transparent 25%, transparent 50%, #222222 50%, #222222 75%, transparent 75%, transparent);

This single line of CSS causes extreme scroll issues. Maybe someone can teach them how to avoid causing this issue?
Why is this tech evang?  We should fix our gradients code, no?
Assignee: english-us → nobody
Component: English US → Graphics
Product: Tech Evangelism → Core
QA Contact: english-us → thebes
My mistake. I thought that it was an abuse of CSS.
It may be that too, but if other browsers don't have a problem with it...
Keywords: perf
Just for reference, link to MozillaZine discussion ==> http://forums.mozillazine.org/viewtopic.php?p=11517587#p11517587
Seeing as this is still marked as UNCONFIRMED, I'm confirming this on Windows 7 32-bits. It makes NHL.com frontpage totally unusable for me. Uses 100% CPU each time I try to scroll and while the page is loading. 

Other pages likes scores, stats and players are just fine.
I saw another report on reddit:
http://www.reddit.com/r/firefox/comments/s5gmx/why_is_nhlcom_so_choppy_on_firefox/

Going to confirm this bug since we have several independent users reporting this.
Status: UNCONFIRMED → NEW
Ever confirmed: true
Whiteboard: [Snappy]
The user in that thread noted that with graphics acceleration turned off the problem disappeared.
I first noticed this bug when I first got my laptop with switchable graphics. The only solution is to turn off graphics acceleration.
I can confirm this. Very jerky scrolling with 100% CPU usage when H/W acceleration is enabled.

With H/w acceleration disabled, scrolling is fine. but still the site uses 60%-70% of the CPU.
Depends on: 761393
will revisit this once 761393 is done
Whiteboard: [Snappy] → [Snappy:p2]
The site scrolls fine with me.
A specific page in the site : 

http://www.nhl.com/ice/schedulebyseason.htm#?navid=nav-sch-sea

uses 80% CPU while scrolling, though the scrolling itself is smooth. So resolved ?
WFM too. Going to call this fixed by bug 761393.
Status: NEW → RESOLVED
Closed: 11 years ago
Resolution: --- → FIXED
You need to log in before you can comment on or make changes to this bug.