It would be a good idea to indicate what version of Lightroom you are using. Yes, it really does make a difference. However, IF you are using Lightroom 6 or Lightroom CC, have you tried turning off GPU acceleration in your Lightroom preferences?
What version of Lightroom?
The issue is most exacerbated during spot removal, at which point it is nearly impossible to accomplish work.
Yes, this is a known drawback to the spot removal/adjustment brush tool, if you do a lot of spot removal or adjustment brushing, that Lightroom does slow down.
Some things you can try
- If Lightroom 6 or Lightroom CC, turn off the GPU acceleration
- Do all your spot healing/brushing as the next to last edit step
- As the last edit step, turn on the Lens Calibration (if desired)
- Get a faster CPU
If none of that works, do the spot healing and brushing in Photoshop or Photoshop Elements.
OPINION: I speak for myself only (and certainly not for Adobe, whom I do not work for and have never worked for), but this non-destructive editing technology that they have built into Lightroom is a fantastic technology; except for the case where you are doing a lot of brushing or spot healing, in which case the technology requires a lot more horsepower than most computers have, and thus for lots of brushing or spot healing, the technology fails.
I have CC and I update whenever there is a new version, so the Lightroom I'm using is always the latest update.
It isn't just slow though, it is ridiculously slow. I thought my CPU (just upgraded...) was overkill for LR, but I guess not.
I tried turning off GPU acceleration and that does seem to help. Also killing the profile correction during spot removal helps as well. Still not the speed at which older versions of lightroom worked on the same canon files, on a slower computer. They definitely need to go back to coding school, because something they're doing is grossly inefficient.
Thank you for your help!
I had similar symptoms on my laptop. The following steps corrected it.
-Update to latest vid card driver
-Close LR, go into device manager and disable your vid card.
-Open LR, uncheck the GPU performance option.
-Close LR, go into device manager and enable your vid card.
-Open LR again and test.
Did that, and now with Lens Correction off, it seems to work even faster. This is much more acceptable.
Really appreciate the input here fellas, it has been a big help.