Read the above and am having the same issue.
I let the system run for 2 hours last night, never settled down, continued to use 15-20% of proc.
It has been running 30 minutes again today, we are on the same path. 15-20% of proc.
The suggestion to let it run is fine by me, but I need to know an end game and some idea of what is taking so long.
Quad Proc, 8GB ram, 1TB Hybrid Drive.
Not sure how anything can take this long to actually build a sand box.
Can't kill process, only option is logout, or reboot.
Then it starts again.
Input is appreciated.