DENOISE boggs down after a few uses . . .

Question

I have a question/issue with Lightroom's DENOISE feature. After the fourth or fifth image I denoise (taking about 8-12 seconds each), the next one from that point on takes from9-12 MINUTES to do the DENOISE. Why does the program suddenly stop effeciently executing the DENOISE process and bog down and become painfully slow. I am using it on images that are all from the same camera (EOS R5) shot at the same location, so there are no significant changes to the content of the images. I find the only way to bring the DENOISE process up to speed again is to reboot my computer. Closing and reloading Lightroom doesn't help. I have a Windows 11 machine, with 128GB of RAM, and a co-processor with 12GB of coprocessor RAM. I don't think the issue is a lack of hardware capability. So, what's the scoop?

Gordon35487258voi4 · Answer

Update:  I did CTRL-ALT-DEL and looked at resources.  Lightroom was chewing up the most resources, but dispite the fact that Photoshop was open with nothing processing, it was chewing up almost as many resources as LR.  So force-stopped Photoshop, and the next DENOISE went fine at about 10 seconds.  I have since closed Photoshop after each use, and the LR DENOISE seems to be working fine with each file.  So it seems that Photoshop was hogging so much of the Windows resources, LR couldn't execute DENOISE very fast att all.  So my new workflow is to close PS after each edit, and re-open it again when I need it.  Leaving it open (even thought I'm not using it) was causing the conflict/bog down.

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