After using a Ryzen 7 1700 for more than a year I am admitting defeat. I use a lot of correction brushes and the performance is so slow I just can't live with it anymore. I am considering an 8700k build; am I doing the right thing?
P.S I photograph children and the brushes are essential for the skin, I want to reduce the need for photoshop which runs like a dream on the same PC. I am no longer prepared to wait for Adobe to add multicore support.
Ryzen 7 1700 @ 3.5ghz
32gb DDR4 ram
This isn't an AMD vs Intel issue. A faster CPU might help a little, but won't solve the problem. The problem is doing a lot of brushing — this is a known cause of slowness.
You could try turning off the GPU acceleration (Preferences->Performance Tab->uncheck "Use Graphics Processor")
If you have a 4K or larger monitor, you might want to reduce the resolution to 1920x0180.
You might want to try doing the brushing as the next to last step of editing; and the last step is to turn on transforms and lens corrections
You might want to try doing the brushing in Photoshop.
But the bottom line is that doing lots of brushing will cause slowness, there's no way around this. How much brushing (what does "lots" mean?) depends on many things, including your hardware and size of the images (in pixels), but you are clearly at that point. Sadly, if you must do a lot of brushing, LR is not a good tool at this time.