787695 - very slow repaint on scroll (only with border radius on li elements)

Status: RESOLVED DUPLICATE of bug 786817

(Core :: Graphics, defect)

Description

[kb]

Attachment: detailed steps

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0
Build ID: 20120824154833

Steps to reproduce:

Scroll the scrollbar (see attached document).
URL http://tomtomexpert.comxa.com/rw/#la=47.99835540203972&ln=7.5823359489440945&z=5&tb=1-3-57-27-7-9-13-2-29-16&tl=41-6-5-4-44-59-58-54-28-56-55-10-12-11-14-47-8-23-24-15-25-32-48-52-30-31-45-46-17


Actual results:

Some elements from the list disappear on scroll start. They reappear about 3 seconds after stopping scrolling. Scrolling is smooth tho.

This bug happens on Firefox 15 and 16. Version 14 and older are working fine.


Expected results:

Scroll without hiding elements.

Comment 1

[kb]

This bug isn't happening when the border radius is removed from the li elements (tested with firebug on the same page).

removed css property:

.tab_primlist li {
    border-radius: 0.5em 0.5em 0.5em 0.5em;
}

Comment 2

[Alice0775 White]

Regression window(m-c)
Good:
http://hg.mozilla.org/mozilla-central/rev/2db9df42823d
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120504030509
Bad:
http://hg.mozilla.org/mozilla-central/rev/e1a40027dc7e
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120504014349
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=2db9df42823d&tochange=e1a40027dc7e


Regression window(m-i)
Good:
http://hg.mozilla.org/integration/mozilla-inbound/rev/c608de1b6a53
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120502221102
Bad:
http://hg.mozilla.org/integration/mozilla-inbound/rev/77bf50b33a05
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/15.0 Firefox/15.0a1 ID:20120502223302
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=c608de1b6a53&tochange=77bf50b33a05

Suspected: Bug 716439

Comment 3

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Possibly a dup of bug 786817.

Comment 4

[Alice0775 White]

Yes, the try server build http://ftp.mozilla.org/pub/mozilla.org/firefox/try-builds/[e-mail]-11825cd2645a/try-win32/firefox-18.0a1.en-US.win32.zip fixed this issue.

Comment 5

[kb]

Thanks for the fix, it's working fine! In which version will it be released? 18 or earlier?

Comment 6

[Nick Cameron [:nrc]]

(In reply to kb from comment #5)
> Thanks for the fix, it's working fine! In which version will it be released?
> 18 or earlier?

earlier, exact version TBC :-)

Comment 7

[Nick Cameron [:nrc]]

I confirmed this bug and confirmed it is fixed by the patches in 786817, so closing as a dup.