319828 - Loading a del.icio.us page with many tags hangs Firefox for a few seconds

Status: RESOLVED WORKSFORME

(Core :: Layout: Floats, defect)

Description

[Jesse Ruderman]

Ways to see slowness with http://del.icio.us/jesser or the testcase:

* Just load the page, and hover over toolbar buttons to see that Firefox is unresponsive for a second or two during the load.

* Make sure Firefox is set to not show the tab bar when there's only one tab.  Load the page in the only tab, then middle-click the Home button.  There is a delay of about a second before the new tab appears, and a similar delay if you close the tab.

* Resize the window while the page is visible.

bz says "most of the time is in reflow... 105586 nsBlockReflowState::AddFloat" (with the original page, not the testcase).

Comment 1

[Jesse Ruderman]

Attachment: fairly simple testcase

Comment 2

[Boris Zbarsky [:bzbarsky]]

Attachment: Profile of the testcase

Comment 3

[Jesse Ruderman]

This is less painful now that del.icio.us lets me set a cookie to restrict which tags appear in the sidebar (the "use minimum" option at the bottom of tag lists).

Comment 4

[Jesse Ruderman]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a2pre) Gecko/20070118 Minefield/3.0a2pre

WFM with the "fairly simple testcase", but http://del.icio.us/jesser is still bad :(

Comment 5

[Jesse Ruderman]

WFM on delicious due to delicious redesign.