[Bug 32305] New: Dr.com response slowly when clicking on menu

http://bugs.winehq.org/show_bug.cgi?id=32305

Bug #: 32305
           Summary: Dr.com response slowly when clicking on menu
           Product: Wine
           Version: 1.5.17
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

Hello, this bug is found when testing on Bug 32289, it's introduced by the
following commit:

$ git bisect bad
7304445a7efa9f30e4541b075a2022319f291e4e is the first bad commit
commit 7304445a7efa9f30e4541b075a2022319f291e4e
Author: Alexandre Julliard 
Date:   Thu Sep 6 12:38:13 2012 +0200

user32: Maintain a list of active window surfaces and flush them
periodically.

:040000 040000 d6b8f4ca6d5580fd689cb2ac8f1b66f4f296fc01
704eac5fc311e63d373e399c63a2488a6b3dedca M    dlls

0. Download Dr.com client(ver3.73, build3700)
http://ishare.iask.sina.com.cn/f/13638045.html

1. winetricks -q mfc42

2. install Dr.com

3. start Dr.com
~/.wine/drive_c/Program\ Files/Dr.COM宽带认证客户端$
$ wine ishare_user.exe

4. Click on menu bar, or type in any input form

Expect result:
The UI of Dr.com should be response instant
Actual result:
The UI hang for a short while when clicking on menu bar, the inputted letters
delay for a short while when typing into input form.

I'm not sure whether it is a 'real regression', will retest after Bug 32289
fixed.