354351 - Firefox takes more and more memory, and 99% of the CPU on this page

Status: RESOLVED WORKSFORME

(Core :: JavaScript Engine, defect)

Description

[Andrew]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9a1) Gecko/20060926 Minefield/3.0a1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9a1) Gecko/20060926 Minefield/3.0a1

When going to this site (http://www.lukeredpath.co.uk/2006/8/29/developing-a-rails-model-using-bdd-and-rspec-part-1) firefox becomes unresponsive and consumes more and more memory until it is killed.

Reproducible: Always

Steps to Reproduce:
1.Go to http://www.lukeredpath.co.uk/2006/8/29/developing-a-rails-model-using-bdd-and-rspec-part-1
2.
3.

Actual Results:  
Firefox becomes unresponsive and consumes all system resources.

Expected Results:  
Open the page.

Comment 1

[Ria Klaassen (not reading all bugmail)]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060926 Minefield/3.0a1

Yeah, I see the same. It' a script on that page.

Comment 2

[Adam Guthrie]

Ouch, this is pretty bad. No "slow running script" dialog, either. Maybe Martijn can come up with a minimized testcase.

Comment 3

[Martijn Wargers (dead)]

Attachment: testcase

Well, when minimizing, I come to this.
It seems that the hang happens because a very large string is trying to be made.
I'm not sure if that is also the case with the url.

Comment 4

[Wayne Mery (:wsmwk)]

Is it much better for you using trunk/beta?

Not sure how bad this testcase was in FF2 or 3.0, but testcase isn't too bad in Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1b3) Gecko/20090305 Firefox/3.1b3