Lightroom 6 responds very slow, especcially in the develment mode. After developing a photo it is not possible to go to the next photo or the one before. Stepping to the Library mode is nessesary and than again to Develop. This happens often and it does not feel good.
I use 6.6.1 on Windows10. Pc specs: Intel I7, 12 GB memory and an additional 2 GB on my graphic card