513977 - Firefox hangs restoring form with lots of checkboxes with brackets in form item name

Status: RESOLVED DUPLICATE of bug 477564

(Firefox :: Session Restore, defect)

Description

[Dietrich Ayala (:dietrich)]

Followup issue from bug 477564 comment #110:

"Just a note: the test case with 4000 checkboxes passes with flying colors on FF
352, UNLESS you use brackets in the checkbox name: 
<input type="checkbox" name="category[]" value="1" />Item 1<br/> etc...
Then it stalls completely."

Comment 1

[Simon Bünzli]

(In reply to comment #0)
> "Just a note: the test case with 4000 checkboxes passes with flying colors on
> FF 352

I doubt that the brackets make the difference, considering that Firefox 3.5.2 still suffers from the original bug (the fix is in 3.5._3_). This is likely due to us not saving form state for http_s_ pages, if the original test was attachment 388399 [details] and the modified test a local file.

Comment 2

[Gaetano Giunta]

Indeed, the test file used was attachment 388399 [details] and the modified version a local file (now attached).

The exact behaviour experienced is:
- opening att. 388399: page renders fine, no noticeable lag
- opening the modified version: FF stalls with no 100%cpu usage nor ram explosion

The problem was noticed first on pages with much less than 4000 checkboxes - at around 100 the behaviour is: page loads ok, but then after a few seconds the interface starts having random intermittent 30 secs 'stalls'

Comment 3

[Gaetano Giunta]

Attachment: modified version of attachment 388399

Comment 4

[Simon Bünzli]

My guess from comment #1 was correct: