Counting primes in [2, 200000) across 16 workers, 5 iterations each

     runtime |    primes found |           median |             min |             max
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    baseline | primes:  17984 | median:     7244 µs | min:     7231 µs | max:     7509 µs
       smarm | primes:  17984 | median:     7592 µs | min:     7505 µs | max:     8130 µs
       tokio | primes:  17984 | median:     7263 µs | min:     7225 µs | max:     9067 µs
