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perf.md

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Execution speed

Speed observed on a single-core ARM7 with 1.4GiB of data

rust md-5.Md5, BUFFER_SIZE=4096

real 6m7.157s user 6m1.820s sys 0m4.110s

rust md-5.Md5, BUFFER_SIZE=1024

real 6m14.614s user 6m6.980s sys 0m7.130s

rust sha2.Sha256, BUFFER_SIZE=4096

real 15m40.432s user 15m34.710s sys 0m4.790s

rust sha2.Sha256, BUFFER_SIZE=4M

real 15m34.278s user 15m17.100s sys 0m3.030s

external md5sum *

real 0m16.766s user 0m10.700s sys 0m2.780s

external sha256sum *

real 0m28.833s user 0m23.530s sys 0m4.550s

rust Command sha256sum

real 0m29.561s user 0m25.130s sys 0m2.910s

rust Command md5sum

real 0m17.346s user 0m10.500s sys 0m2.960s