366406 - Copy / paste message source and change identity / From address consumes CPU

Status: RESOLVED DUPLICATE of bug 324521

(Thunderbird :: Message Compose Window, defect)

Description

[J.M.Roth]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1
Build Identifier: 1.5.0.9 (20061207)

If you copy the entire message source of a mail into a new "Compose mail" window, and then change the From: address in the dropdown at the top of the window, CPU usage is 100% for several seconds. I also experienced complete lockups (100% CPU forever).

Reproducible: Always

Steps to Reproduce:
- Get a large mail (>50kB)
- goto the message source window 
- say "Select all" (Ctrl-A) then "Copy" (Ctrl-C)
- Open a new message window
- Paste the stuff (Ctrl-V)
- Change the From line in the dropdown at the top

Actual Results:  
CPU @ 100% for quite some time

Expected Results:  
Pasted those few lines in the blink of an eye

Comment 1

[Magnus Melin [:mkmelin]]

Does turning off inline spell checking help? If so, mark this as duplicate of
bug 324521.

Comment 2

[J.M.Roth]

Yeah this seems to alleviate the problem...