641116 - CPU usage very high when loading http://alrosan.net/ (Silverlight site)

Status: RESOLVED INCOMPLETE

(Core Graveyard :: Plug-ins, defect)

Description

[Marcia Knous [:marcia]]

Attachment: Screenshot of CPU usage

Seen while running Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b13pre) Gecko/20110311 Firefox/4.0b13pre

STR:
1. New machine. Install latest version of Silverlight plugin Version: 4.0.60129.0
2. Load http://alrosan.net/
3. View activity monitor - CPU usage can get as high as 300% (see attached screenshot)

I don't have any other plugin content running in any other tabs.

Model Name:	MacBook Pro
  Model Identifier:	MacBookPro8,2
  Processor Name:	Intel Core i7
  Processor Speed:	2.3 GHz
  Number of Processors:	1
  Total Number of Cores:	4
  L2 Cache (per Core):	256 KB
  L3 Cache:	8 MB
  Memory:	8 GB
  Boot ROM Version:	MBP81.0047.B04
  SMC Version (system):	1.69f1
  Serial Number (system):	C02FC8CYDF91
  Hardware UUID:	66720BA3-F82E-53EA-8AB6-D36289142677
  Sudden Motion Sensor:
  State:	Enabled

Comment 1

[Benjamin Smedberg]

Is this a regression? Why do you think it's a bug? Is Firefox running with accelerated graphics?

Comment 2

[Wayne Mery (:wsmwk)]

don't see anything silverlight related in current contents of http://alrosan.net/