Freezing while scrolling or resizing http://www.showcase.ca/schedule

NEW
Unassigned

Status

()

Core
JavaScript Engine
3 years ago
3 years ago

People

(Reporter: kenkon, Unassigned)

Tracking

({hang})

Trunk
Points:
---

Firefox Tracking Flags

(Not tracked)

Details

(URL)

Attachments

(2 attachments)

(Reporter)

Description

3 years ago
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release)
Build ID: 20140716183446

Steps to reproduce:

1. Go to http://www.showcase.ca/schedule
2. Scroll the page (e.g. arrow keys, mouse wheel, scrollbar, etc.)
OR
3. Resize the window by dragging a border.


Actual results:

There is a 1-2 seconds delay, during which the UI is frozen, between the user action and the page being actually scrolled or resized.

Reproduced with:
Firefox 32.0b2
Firefox 32.0b3
Nightly 34.0a1 (20140804030205)

Not an issue with:
Firefox 31.0 (release)
Opera 23.0.1522.60 (for comparison)


Expected results:

The page should scroll/resize instantly without freezing. It works in Firefox 31.
(Reporter)

Updated

3 years ago
(Reporter)

Comment 1

3 years ago
Before you ask, I have already tried:

1. Safe-mode/clean profile
2. HWA off
3. Smooth Scrolling off.

Comment 2

3 years ago
I was able to reproduce on OS X with current Nightly.
Status: UNCONFIRMED → NEW
Ever confirmed: true
Keywords: hang
OS: Windows 7 → All
Hardware: x86_64 → All
Version: 32 Branch → Trunk

Comment 3

3 years ago
The site works normal if JavaScript is disabled, so I think it's related with the JavaScript Engine.
Component: General → JavaScript Engine
Can somebody try to get a stack using Windbg (or equivalent on other OS)
https://developer.mozilla.org/en-US/docs/How_to_get_a_stacktrace_with_WinDbg
(Reporter)

Comment 5

3 years ago
Created attachment 8469748 [details]
firefox-debug_12f4_2014-08-07_21-06-06-906.log

Here is my WinDbg output. I tried to break during the hang but I'm not sure that I did it in time. If needed, I can try again.
Attachment #8469748 - Attachment mime type: text/x-log → text/plain
(Reporter)

Comment 6

3 years ago
UPDATE: Firefox 31.0 (with clean profile) IS affected by this bug. In my initial test, NoScript was blocking liveinsite.com which, once allowed, seems to cause the freezing.
(Reporter)

Comment 7

3 years ago
Created attachment 8470932 [details]
Output of the Firefox Web Console after loading URL
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