[Bug 303945] [NEW] [intrepid] firefox uses 100% cpu when editing wikipedia/mediawiki pages

[gavinmc]

Public bug reported:

Binary package hint: firefox-3.0

It's possible this is related to bug 185469, or that the wikipedia
editor has a bug, I'm unsure.

When I choose to edit some wikipedia pages, firefox initially performs
fine but as time goes on it begins to respond more and more slowly.  It
uses 100% cpu.  If I move to another window and back again, I can end up
waiting 30 seconds for the firefox window to repaint.  After a bit of
this, I generally end up killing firefox and restarting it, recovering
the previous session (thankfully that works and doesn't lose my edits).
I can avoid killing firefox if I regularly choose to "show preview", ie
to submit changes and load a new page.

One wikipedia page which I edit that shows this regularly (5-6 times
last night) is:

   http://en.wikipedia.org/w/index.php?title=Mountjoy_Square

I have experienced this regularly on my laptop (a Dell Latitude, more
details to come) but now that I'm trying to reproduce it on my desktop,
I'm not seeing the issue.  I'm not sure if this is due to less actual
editing or if there's something different about the hardware.  Both
machines run pretty standard up to date installs of intrepid.

I will try and revert with more detail,
Gavin

** Affects: firefox-3.0 (Ubuntu)
     Importance: Undecided
         Status: New

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[intrepid] firefox uses 100% cpu when editing wikipedia/mediawiki pages
https://bugs.launchpad.net/bugs/303945
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