I'm using Beta 8.0 Beta 1 on Windows 10, and random wallpaper every 30 mins from a local dir of bmp and jpg files.

Every time the wallpaper changes, the whole computer freezes for a second; both sound, picture, mouse movement, keyboard typing, everything just stands still for 2 seconds or so until the new wallpaper appears.

Is the randomization, cropping, scaling, etc. not running in a low priority thread? Or am I having some other problem?

There's a CPU spike and Disk spike whenever the wallpaper changes.
It looks like DisplayFusion.exe spawns a DisplayFusionSettings.exe upon every wallpaper change, which terminates immediately afterwards.
According to Sysinternals process monitor, there's a Disk usage of 6MB/s on the DisplayFusion.exe, 279 file I/O operations and about 8-10% CPU usage.
DisplayFusionSettings.exe that spawns on every wallpaper change has disk usage of 118KB/s, 1226 file I/O operations and about 2-5% CPU usage.
The disk is a Crucial SSD mSata.
I've tried changing to a folder with smaller jpg files in it instead, but it makes no difference. There's still a 1-2 second complete desktop freeze until the new wallpaper appears.

I just tried that, unfortunately it makes no difference.

Tried that too now, still the same problem.
According to the performance measurements I did earlier, it doesn't seem to be a resource starvation issue. There's SOMETHING going on that just makes the whole computer freeze.
If I right-click the desktop and click 'personalize', I get the the built-in windows wallpaper selection screen. If I select any of these, the PC freezes for a moment too.
I don't know if it's Windows, or some displayfusion hook that has changed stuff, but just changing wallpapers makes the computer freeze.

Edit: There's another strangeness; I have the Advanced Option "Don't load random images on apply" active. If I open the Desktop Wallpaper option on Displayfusion, and then click "OK" without changing anything, I get the temporary freeze also. Even though the wallpaper isn't changing.

If by 'exit DisplayFusion', you mean right-clicking the systray icon and selecting exit, then yes it freezes too. But this doesn't stop all the displayfusion stuff. All the open windows still have apphooks and things running, if the process manager is to be believed.

Is displayfusion using the built-in windows wallpaper changing function, or does it have its own method?
Is there a way to debug or monitor the wallpaper change to see where the freeze comes from?

Hi,
Is it supposed to freeze like that, do you see the same issue?
I've just done a fresh install of Windows 10 over the holidays and I see the same freezing still happening.