Alright, I'll copy my post above which hopefully includes the info you need over to the other site. Lance Here's what I posted there: There is simply no question that LR 2015.9 (and earlier) slows down with continued use during a session. This is easy to replicate and demonstrate. Lightroom starts up responsive and quick and, after a short while of working with images, begins to bog down: screen redraws, edits, crops etc all start to take longer and longer to accomplish. Ultimately, previously instant tasks start taking 5 seconds or longer. If you quit the app and restart the behavior resets to good response but then repeats as above. Windows 10 Intel 6950X 256GB RAM 2/Nvidia Titan Pascals 2/Nvidia GeForce 1080's (tried with and without acceleration on) All SSD or M.2 storage less than half capacity ALL LATEST VERSIONS OF DRIVERS/SOFTWARE 100GB Cache (purged before testing)
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