[Bug 44243] New: Spire and Serum paints very slowly

https://bugs.winehq.org/show_bug.cgi?id=44243

Bug ID: 44243
           Summary: Spire and Serum paints very slowly
           Product: Wine
           Version: 3.0-rc3
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Hi,

The following programs take a lot of time to render the UI:

https://www.reveal-sound.com/

https://www.xferrecords.com/products/serum

A few versions before the UI was just black, and recently it started to paint
correctly, so it must be that you have add new painting/rendering api recently.

Yet the painting performance is really slow, so it would be great if you guys
could have a look and optimize it a bit? Maybe it is an easy thing to do?

Many thanks for your work guys!

To reproduce it you can install a plugin host like reaper:
https://www.reaper.fm/ and then install the vst plugins and try them with
reaper.

Regards,
Alexandre