Steffen Nurpmeso:

> However, he also said

>   Previously I recommended using a special value, such as "-j0", to mean
>   "best guess".

xz(1):
  -T threads, --threads=threads
	 Specify the number of worker threads to use.  Setting
	 threads to a special value 0 makes xz use up to as many
	 threads as the processor(s) on the system support.

-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de