User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:18.0) Gecko/20100101 Firefox/18.0 Build ID: 20130119055004 Steps to reproduce: Simple. Start browser, go to www.wiktionary.org. Actual results: CPU usage for 1 core goes to maximum. (I saw 25% usage on a quad core system, and 50% usage on a dual core.) CPU usage stays high until the user scrolls down and reaches the line that says "Other languages". If the user reloads the page, CPU usage goes back up to maximum. I tried Firefox 15, and did not see this problem.
Regression window(m-c) Good: http://hg.mozilla.org/mozilla-central/rev/bf37951c1104 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0a1 ID:20120623031143 Bad: http://hg.mozilla.org/mozilla-central/rev/e21173ed2c38 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0 ID:20120623053647 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=bf37951c1104&tochange=e21173ed2c38 Regression window(m-i) Good: http://hg.mozilla.org/integration/mozilla-inbound/rev/80b8680bda1c Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0 ID:20120622175046 Bad: http://hg.mozilla.org/integration/mozilla-inbound/rev/c35d2d3071ac Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/16.0 Firefox/16.0 ID:20120622182843 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=80b8680bda1c&tochange=c35d2d3071ac In local build Last Good: 23f5c88adb8f First Bad: 612ee5c6300d Triggered by: 612ee5c6300d Mats Palmgren — Bug 575294. part=3/5 r=roc
Status: UNCONFIRMED → NEW
Component: Untriaged → Layout
Ever confirmed: true
Keywords: perf, regression
OS: Linux → All
Product: Firefox → Core
Whiteboard: Regressed by Bug 575294
Version: 18 Branch → 16 Branch
http://hg.mozilla.org/mozilla-central/rev/677e87c11252 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20130130 Firefox/21.0 ID:20130130030907 It is worse on Windows. Option of select tag cannot expand by click dropdown marker until I scroll a page.
status-firefox-esr17: --- → affected
tracking-firefox18: --- → ?
tracking-firefox19: --- → ?
tracking-firefox20: --- → ?
tracking-firefox21: --- → ?
tracking-firefox-esr17: --- → ?
Component: Layout → Layout: Form Controls
Attachment #708319 - Attachment description: windbg log → windbg log (High CPU usage after complete loading page)
Assignee: nobody → matspal
We'd accept a low risk uplift once found.
tracking-firefox18: ? → -
tracking-firefox19: ? → -
tracking-firefox20: ? → -
tracking-firefox21: ? → -
tracking-firefox-esr17: ? → -
Is this still a problem?
Not a problem any more, as far as I can tell. Checked Firefox 22 and 23, and could not reproduce. Some change before Firefox 22 seems to have fixed it.
WFM, FF22, 23 and trunk on Linux64.
Alice, can you still reproduce this bug?
Unfortunately?, The site changed something... I cannot reproduce the problem in the BAD build in comment#1. And of course, I cannnot reproduce in Firefox17.0.8esr Firefox23.0a1 and later.
Thanks for testing. I don't see much value in keeping this bug open then.
Assignee: matspal → nobody
Fixed by www.wiktionary.org.
Status: NEW → RESOLVED
Last Resolved: 5 years ago
Resolution: --- → WORKSFORME
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