"xz -d": 7.92 seconds

"bzip3 -d" as filter: SEGSEGV

"bzip3 -d linux-5.17.6.tar.bz3": 81 seconds

"bzip -d -j 6": 21.35 seconds (edit)

Lest I be called a liar again:

  $ ./bzip3-1.0.1/bzip3 -d <linux-5.17.6.tar.bz3 >/dev/null
  fish: Job 1, 'time ./bzip3-1.0.1/bzip3 -d <li…' terminated by signal SIGSEGV (Address boundary error)