[Bug 59337] New: HxD is very slow to open a file with theming enabled

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59337

            Bug ID: 59337
           Summary: HxD is very slow to open a file with theming enabled
           Product: Wine
           Version: 11.1
          Hardware: x86-64
               URL: https://mh-nexus.de/en/hxd/
                OS: Linux
            Status: NEW
          Keywords: download, performance
          Severity: normal
          Priority: P2
         Component: uxtheme
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
      Distribution: ---

This happened since ad9dfe8bcc0ad048dc044694969e13235caadf46, but it's not that
commit itself that's the issue, it just enabled comctl32_v6 to be loaded
instead of comctl32 version 5.

Load a file and watch how slow it is, e.g. wine HxD.exe 'C:\windows\win.ini'

Without theming, this problem does not happen (i.e. disable theming in winecfg
to check).

Reverting the mentioned commit makes it fast even with theming, however
replacing the version in the Makefile from 5,81,4704,1100 to 6,0,2600,2982 even
for comctl32 version 5 makes it slow again EVEN with the commit reverted, so
it's probably some different path taken if the version is 6 that makes it slow,
and not the code in comctl32_v6 itself.

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