Lr seems to be generally slow. Takes about 1.5 minutes to launch. Then, when I use sliders, there is a lag of a few seconds before I see results on the image. Also, I get the spinning beach ball a fair bit on my Mac (which is only 1-2 years old tops & the OS is up to date) when using Lr. Anyone else with the same issue?
Please state the version of Lightroom and also the exact operating system you are using.
In Lightroom, are you doing a lot of brushing or spot healing?