https://bugzilla.wikimedia.org/show_bug.cgi?id=40630

Siebrand <s.mazel...@xs4all.nl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |asha...@wikimedia.org,
                   |                            |junu.pv+pub...@gmail.com,
                   |                            |santhosh.thottingal@gmail.c
                   |                            |om
          Component|General/Unknown             |Narayam
            Version|wmf-deployment              |master
         AssignedTo|santhosh.thottingal@gmail.c |wikibugs-l@lists.wikimedia.
                   |om                          |org
            Product|Wikimedia                   |MediaWiki extensions
            Summary|gu.wikisource has become    |Performance issue with
                   |sluggish on IE              |Internet Explorer and
                   |                            |Narayam

--- Comment #13 from Siebrand <s.mazel...@xs4all.nl> 2012-10-09 19:42:12 UTC ---
I'm using a mid 2010 MacBook Pro 2,66 GHz Intel Core i7 with Windows 7 with
2.4GB RAM and 2 cores assigned in VMWare 5.0.1.

I've tested with Windows 7 (nlNL local), fully patched, with IE9.0.812. 

Site visited: http://sandbox.translatewiki.net

This runs MediaWiki 1.21 alpha (master/HEAD) and the latest versions for
extensions.

Logged in user, with setlang=de

Observations:
1. IME disabled in preferences: 4-5% CPU utilisation while editing*
User:Siebrand
2. IME enabled in preferences, disabled in UI: 5-10% CPU utilisation while
editing User:Siebrand
3. IME enabled in preferences, enabled in UI: 10-25% CPU utilisation while
editing User:Siebrand

* "editing" is in this case random keystrokes in the edit screen. Example:
sdfsdfa sdfawerfavs bvsd vsdfvsdfvsdfvsdfvsdfv. I have no noticeable
performance degradation, but I can imagine that for slower/older hardware it is
noticeable. What I notice is that while inputting text in scenarios 2 and 3, my
notebook fan starts buzzing.

I'm going to pull in jQuery 1.8.2 from gerrit 27298 now, to see if that helps
any. http://bugs.jquery.com/ticket/12436 was about "Performance degradation
with delegate events and pseudo-classes".

More later.

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