[Update / Edit] I just spun up a VM with 20 cores and p7zip uses all of them without any flags. Version 16.02 from the EPEL repo. No idea how this new build

[Update / Edit] I just spun up a VM with 20 cores and p7zip uses all of them without any flags. Version 16.02 from the EPEL repo. No idea how this new build differs.