Beta 4 high cpu usage when slideshow is enabled, actual slideshow change interval greatly increased, saving wallpaper profile time greatly increased. Is this workikng as intended?

High CPU usage does not go down at all regardless of #of images in unless all were set to solid color, non-slideshow backgrounds.
9900X3D Display Fusion CPU Usage with any image slide show enabled: 6.9% - 11.1%
For comparison: Firefox (20 active tabs Google, Wowhead, GPT, Twitch streams) 2-5%, World of Warcraft Client 4-9%
Solid color (black), 14 splits: 0.1-1%

Beta 3: 0.1-1%

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Slideshow actual time to change backgrounds:
Global Image History ON:
3286 images, 14 splits, 1 minute interval: 7 minutes 30 seconds

Global OFF:
3286 images, 14 splits, 1 minute interval: 6 minutes 30 seconds

32 images, 14 splits, 1 minute interval: 1 minute 5 seconds
101 images, 14 splits, 1 minute interval: 1 minute 5 seconds
1220 images, 14 splits, 1 minute interval: 2 minutes 50 seconds
3286 images, 14 splits, 1 minute interval: 6 minutes 30 seconds

Beta 3:
3286 images, 14 splits, 1 minute interval: 1 minute 50 seconds

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Saving Desktop Wallpaper settings (Applying Wallpaper Settings):
3286 images, 14 splits (global off): 8 minutes 50 seconds

32 images, 14 splits: 32 seconds
101 images, 14 splits: 36 seconds
1220 images, 14 splits: 3 minutes 15 seconds
3286 images, 14 splits: 8 minutes 50 seconds

Also, with larger numbers of images for the slideshow, swapping profiles is unresponsive . For example, Profile 1 with 3286 images is loaded, switch to Profile 2 with 101 images. Profile 2 is loaded, some minutes later Profile 1 is set active again.