$ hyperfine -N -w1 'b3sum --num-threads 1 electron-25.2.0.tar.zst' 'b3sum --num-threads 4 electron-25.2.0.tar.zst' 'b3sum --num-threads 8 electron-25.2.0.tar.zst' 'sha1sum electron-25.2.0.tar.zst'
Benchmark 1: b3sum --num-threads 1 electron-25.2.0.tar.zst
  Time (mean ± σ):     594.2 ms ±   6.9 ms    [User: 537.5 ms, System: 56.1 ms]
  Range (min … max):   583.8 ms … 600.9 ms    10 runs
 
Benchmark 2: b3sum --num-threads 4 electron-25.2.0.tar.zst
  Time (mean ± σ):     171.5 ms ±   1.5 ms    [User: 550.1 ms, System: 62.1 ms]
  Range (min … max):   169.5 ms … 174.9 ms    17 runs
 
Benchmark 3: b3sum --num-threads 8 electron-25.2.0.tar.zst
  Time (mean ± σ):     112.3 ms ±   9.1 ms    [User: 654.8 ms, System: 68.6 ms]
  Range (min … max):   100.9 ms … 137.0 ms    28 runs
 
Benchmark 4: sha1sum electron-25.2.0.tar.zst
  Time (mean ± σ):      1.080 s ±  0.006 s    [User: 0.918 s, System: 0.162 s]
  Range (min … max):    1.072 s …  1.089 s    10 runs
 
Summary
  b3sum --num-threads 8 electron-25.2.0.tar.zst ran
    1.53 ± 0.12 times faster than b3sum --num-threads 4 electron-25.2.0.tar.zst
    5.29 ± 0.43 times faster than b3sum --num-threads 1 electron-25.2.0.tar.zst
    9.62 ± 0.78 times faster than sha1sum electron-25.2.0.tar.zst
$ du -h electron-25.2.0.tar.zst
2.0G	electron-25.2.0.tar.zst