Slow performance on Windows 10 Fall Creators Update

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  • Updated 4 months ago
Ever since the so-called Fall Creators Update of Windows 10 (version 1709), Adobe Lightroom Classic CC has been suffering from what I believe to be the GDI GetPixel() bug described here:

http://forum.codejock.com/forum_posts.asp?TID=23487&title=very-slow-buttons-on-win-10-fall-creat...

The symptom is that UI performance degrades gradually as Windows remains up, and only a reboot of Windows restores correct performance. Switching modes and tools results in very slow screen repaint after a few days of Windows uptime.

Lightroom is far from the only application experiencing this issue, and I understand that it's Microsoft's bug to fix, ultimately, but the Visual Studio team has also modified MFC to work around the problem in Visual Studio 2017 version 15.6 Preview 2 as described here:

https://developercommunity.visualstudio.com/content/problem/136952/mfc-ribbon-slow-on-first-loadshow...

If this Windows bug reveals any ways that the Ligthroom code can be improved (perhaps even by simply re-linking it with the latest MFC if it's an MFC program), then it would be nice for Adobe to do so.
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David Citron

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Posted 4 months ago

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David Citron

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For anyone having this issue (probably everyone on Windows 10), this update seems to fix it:

https://support.microsoft.com/en-us/help/4058258/windows-10-update-kb4058258

-Dave