Pigz compresses using threads to make use of multiple processors and cores.
man xz
-T threads, --threads=threads
Specify the number of worker threads to use. Setting threads to a special value 0 makes xz use as many threads as there are CPU cores on the system. The actual number of threads can be less than threads if the input file is not big enough for threading with the given settings or if using more threads would exceed the memory usage limit.
[^] # Re: pigz
Posté par Benoît Sibaud (site web personnel) . En réponse au message Question sur la gestion des fichiers compressés avec gzip sous Linux. Évalué à 6.
man pigz
man xz