scrolling on marketplace.firefox.com is choppy

RESOLVED FIXED

Status

RESOLVED FIXED
6 years ago
6 years ago

People

(Reporter: fb+mozdev, Unassigned)

Tracking

(Blocks: 1 bug)

x86_64
Mac OS X
Points:
---

Details

(Reporter)

Description

6 years ago
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:20.0) Gecko/20100101 Firefox/20.0
Build ID: 20130220104816

Steps to reproduce:

Visit Firefox Marketplace start page and scroll around. 


Actual results:

Scrolling is (sometimes) choppy.


Expected results:

Scrolling should be smooooth.
(Reporter)

Comment 1

6 years ago
This happens on a low-level 2012 MBA with 8Gb RAM und just a few programs opened, so this shouldn't be a resource or I/O problem. 

This may be a Fx issue or a Marketplace issue or both. This definitely should be improved.
Blocks: 100951
Hardware: x86 → x86_64
(Reporter)

Updated

6 years ago
See Also: → bug 846459
(Reporter)

Comment 2

6 years ago
This issue seems to arise only when the mouse is hovering over the categories area. If the mouse is on either side of the categories area, scrolling is smooth (as far as I can tell). 

I'm scrolling using the gesture on the built-in touchpad, if this info is of any help.
Component: Untriaged → General
Product: Firefox → Marketing
Version: 20 Branch → unspecified
Component: General → General
Product: Marketing → Marketplace
Version: unspecified → 1.5
(Reporter)

Comment 3

6 years ago
See this answer for a likely cause: 

(In reply to Jeff Muizelaar [:jrmuizel] from bug 846459 comment #11)
> I was actually a little bit wrong. It seems like the actual cause is the
> grain image.
> What's happening is we take the 200x200 image tile it on to a 3040x2560
> surface and scale that down to the particular category tile.
> 
> If you remove the background-size: 10px 10px from mkt/grain.png everything
> draws much faster.
(In reply to Florian Bender from comment #3)
> See this answer for a likely cause: 
> 
> (In reply to Jeff Muizelaar [:jrmuizel] from bug 846459 comment #11)
> > I was actually a little bit wrong. It seems like the actual cause is the
> > grain image.
> > What's happening is we take the 200x200 image tile it on to a 3040x2560
> > surface and scale that down to the particular category tile.
> > 
> > If you remove the background-size: 10px 10px from mkt/grain.png everything
> > draws much faster.

This has been fixed on -dev and will land tomorrow. The 10px was a typo, it should've been 100px (for retina). There should be a Firefox bug filed if there is not already, as this performs fine in Chrome.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 6 years ago
Resolution: --- → FIXED
(Reporter)

Comment 5

6 years ago
This is probably Bug 732150, no?
See Also: → bug 732150
(In reply to Florian Bender from comment #5)
> This is probably Bug 732150, no?

I think that bug accurately describes the same issue, yes.
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