247460 - Scrolling in Extension Manager Window raises CPU load to nearly 100%

Status: RESOLVED DUPLICATE of bug 227260

(Toolkit :: Add-ons Manager, defect)

Description

[Roasted]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040614 Firefox/0.9
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040614 Firefox/0.9

I've got a lot of extensions installed. To configure the ones listed on the
bottom of the Extensions window I have to scroll with the mouse. When doing
this, the response gets dramatically sluggish. I checked with the Windows Task
Manager: the CPU load of the firefox.exe process raises to about 98% when scrolling.

Reproducible: Always
Steps to Reproduce:
1. Open "Tools" - "Extensions"
2. Grab the scrollbar with the mouse and drag it down to scroll to the bottom
3. Notice the sluggish behaviour and jumping of the mouse cursor. Check CPU-load
with the Windows Task Manager

Comment 1

[José Jeria]

Confirming,
Seing a 40% cpu usage only with 1 extension installed + dom inspector (listed,
not installed)

Comment 2

[Oleg Sidletskiy]

Note: you can get even higher CPU usage if instead of grabing the scrollbar, you
click (and hold) the up/down scroll arrows

Comment 3

[Alfred Kayser]

See also:
http://bugzilla.mozilla.org/show_bug.cgi?id=227260
(may be even a DUP of that one?)

Comment 4

[Roasted]

You are quite right, thank you. Bug #227260 is even a 1.0-blocker, so that issue
is well-covered.


*** This bug has been marked as a duplicate of 227260 ***