$ /usr/bin/time date
   Fri Oct 24 10:20:17 AM CDT 2025
   0.00user 0.00system 0:00.00elapsed 0%CPU (0avgtext+0avgdata 2264maxresident)k
   0inputs+0outputs (0major+93minor)pagefaults 0swaps

Imagine how much faster it will be with threading!

Rather think of cp, mv, install, backup. Copying files faster is still an ongoing effort, also in gnu coreutils

When I want to do stuff in parallel at the OS level, I rather user processes and e.g. GNU parallel.