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Issue 658591 link

Starred by 1 user
Status: Assigned
Owner:
dtapu...@chromium.org
Cc:
bokan@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 3
Type: Bug


Participants' hotlists:
Input-Dev-Performance


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Extremely janky scrolling on tomshardware.co.uk

Project Member Reported by primiano@chromium.org, Oct 23 2016 
Personal MacBook Pro 13
Chrome beta 54.0.2840.59
URL: http://www.tomshardware.co.uk/forum/291194-32-black

Page has a bunch of ads
scrolling is consistently janky, even waiting several seconds after load. Sometimes I get into the single digit fps.
Site scrolls smoothly on Safari.
Attaching trace
trace_tomshardware.json.gz
4.9 MB Download

Comment 1 by dtapu...@chromium.org, Nov 2 2016

Components: Blink>Scroll

Comment 2 by bokan@chromium.org, Nov 3 2016

Cc: bokan@chromium.org
Labels: Hotlist-Jank Hotlist-Input-Dev Performance
Owner: dtapu...@chromium.org
Status: Assigned (was: Untriaged)
Looks like we're scrolling on the main thread and there's lots of JS running all the time. Someone should look at why we're forced to handle the events on main, perhaps the passive event listener intervention will help here?

Comment 3 by benhenry@google.com, Jul 14 2017

Labels: -Performance Performance-Responsiveness
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