264534 - CPU usage at 100% when loading a web page

Status: RESOLVED INVALID

(Core Graveyard :: GFX: Win32, defect)

Description

[Tony]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Firefox/0.10 StumbleUpon/1.998
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Firefox/0.10 StumbleUpon/1.998

When a webpage is loaded, the CPU usage goes to 100%.  This makes the
application momentarily sluggish, and causes a delay in things like scrolling, etc.

Reproducible: Always
Steps to Reproduce:
1.Go to a webpage (any webpage)
2.Notice CPU usage while page loads
3.

Actual Results:  
See details

Expected Results:  
The softare, I assume, should not require 100% CPU to load a page

Comment 1

[Frank Wein [:mcsmurf]]

And now what's the problem? Firefox needs to use CPU to render a webpage. If you
think the cpu usage is too high, also consider starting Firefox in Safe Mode,
some extensions also soak up CPU power.

Comment 2

[Boris Zbarsky [:bzbarsky]]

Marking invalid.  We can't very well render things without using the CPU some. 
I suppose we could use 50% of the CPU for twice as long, but that's a little silly.