[Bug 43728] Magic: The Gathering Online intensive CPU usage when idle

https://bugs.winehq.org/show_bug.cgi?id=43728

--- Comment #12 from Anton Romanov  ---
(In reply to Panard from comment #11)
> So here is what is happening:
> - Call to CoWaitForMultipleHandles (ole32/compobj.c)
> - Enters while(TRUE) section with message_loop = TRUE
> - Call MsgWaitForMultipleObjectsEx (line 4513 of vanilla git)
> - Returns WAIT_OBJECT_0 + cHandles, enters the if section (line 4517)
> - COM_CurrentApt()->filter is false
> - Call to COM_PeekMessage
> - Call to PeekMessageW twice, both returns 0
> - Therefore the continue instruction restarts the loop, and we go back to 3.
>
> Using WINEDEBUG=ole, we can see some CoWaitForMultipleHandles call
> terminate, but I suspect there could be parallel ones to an infinite one..
> but what we can also see is an infinite flood of
> trace:ole:CoWaitForMultipleHandles waiting for rpc completion or window
> message
>
> We would need an expert of the ole32 dll to help here..

Where is CoWaitForMultipleHandles even called from? Its not in your log extract