You could post your current mesh settings too, maybe something could be adjusted for more speed.
I’m not sure about the detailed settings behind of the “jagged and faster”. Only I know that the option “maximum aspect ratio” can cause a strong slow down some times. You could try a custom setup. Here one of my typical settings if I work in mm.
Hello - are you saying the meshing is slow, or the meshing is noticeably slower than the same file in V5?
-Pascal