I am using hyperlynx 8.2.1
For some reason, Linesim is extremely slow. I mean everything about it is slow. It's as if I am logged in remotely on a really slow network and working.
But boardsim is completely normal. Importing .hyp file, selecting nets, components, models and simulation, they all run fast.
So nothing wrong with my PC.
I have used linesim with an older PC (in my previous organization). I had no issues back then.