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I will try zero-ing the sliders; however, where will that increase the speed? Importing isn't the issue.
Pretty much the sum total of our knowledge on this is in the thread i linked to. If you want to skip the long and boring testing bit and just read the discussion, jump to post 13 and go from there
To summarise it though, there is an interplay between NR/Sharpening and the clarity, highlights and shadows sliders. Once NR is applied, these sliders slow down a lot. And similarly, once clarity, highlights or shadows have been moved from 0, the NR slider becomes quite laggy. Also, with NR turned on zooming and panning around the image becomes a lot more sluggish.
The best workaround therefore seems to be leave NR and sharpening until the end of your workflow, or to set them to what you like and then turn them off. I would note that this does not transform LR into a speedy bit of software, it just limits the worst of the slowness.
Edit: morganb4 beat me to the summary i see, but i would recommend a look through the performance thread, if only to understand that you are not alone.
Edited on Feb 05, 2013 at 02:39 PM · View previous versions