Benchmark #1: cat b1 Time (mean ± σ): 1.076 s ± 0.007 s [User: 5.3 ms, System: 1069.4 ms] Range (min … max): 1.069 s … 1.093 s 10 runs

Benchmark #1: cat b1 Time (mean ± σ): 1.076 s ± 0.007 s [User: 5.3 ms, System: 1069.4 ms] Range (min … max): 1.069 s … 1.093 s 10 runs Benchmark #2: sha256sum b1 Time (mean ± σ): 6.583 s ± 0.064 s [User: 5.440 s, System: 1.137 s] Range (min … max): 6.506 s … 6.695 s 10 runs Benchmark #3: sha1sum b1 Time (mean ± σ): 6.322 s ± 0.086 s [User: 5.212 s, System: 1.103 s] Range (min … max): 6.214 s … 6.484 s 10 runs Benchmark #4: b2sum b1 Time (mean ± σ): 13.184 s ± 0.108 s [User: 12.090 s, System: 1.080 s] Range (min … max): 13.087 s … 13.382 s 10 runs Benchmark #5: b3sum b1 Time (mean ± σ): 577.0 ms ± 5.4 ms [User: 12.276 s, System: 0.669 s] Range (min … max): 572.4 ms … 587.0 ms 10 runs Benchmark #6: md5sum b1 Time (mean ± σ): 14.851 s ± 0.175 s [User: 13.717 s, System: 1.117 s] Range (min … max): 14.495 s … 15.128 s 10 runs Summary 'b3sum b1' ran 1.86 ± 0.02 times faster than 'cat b1' 10.96 ± 0.18 times faster than 'sha1sum b1' 11.41 ± 0.15 times faster than 'sha256sum b1' 22.85 ± 0.28 times faster than 'b2sum b1' 25.74 ± 0.39 times faster than 'md5sum b1' gotdang that's some solid performance. (here running against 10GiB of random bytes; machine has the Sha ASM extensions, which is why sha256/sha1 perform so well) edit: actually not a straight algo comparison, as b3sum here is heavily benefiting from multi-threading; without that it looks more like this: Benchmark #1: cat b1 Time (mean ± σ): 1.090 s ± 0.007 s [User: 2.9 ms, System: 1084.8 ms] Range (min … max): 1.071 s … 1.096 s 10 runs Benchmark #2: sha256sum b1 Time (mean ± σ): 6.480 s ± 0.097 s [User: 5.359 s, System: 1.115 s] Range (min … max): 6.346 s … 6.587 s 10 runs Benchmark #3: sha1sum b1 Time (mean ± σ): 6.120 s ± 0.090 s [User: 5.027 s, System: 1.082 s] Range (min … max): 5.979 s … 6.233 s 10 runs Benchmark #4: b2sum b1 Time (mean ± σ): 12.866 s ± 0.208 s [User: 11.722 s, System: 1.133 s] Range (min … max): 12.549 s … 13.124 s 10 runs Benchmark #5: b3sum b1 Time (mean ± σ): 5.813 s ± 0.079 s [User: 4.606 s, System: 1.202 s] Range (min … max): 5.699 s … 5.933 s 10 runs Benchmark #6: md5sum b1 Time (mean ± σ): 14.355 s ± 0.184 s [User: 13.305 s, System: 1.039 s] Range (min … max): 14.119 s … 14.605 s 10 runs Summary 'cat b1' ran 5.33 ± 0.08 times faster than 'b3sum b1' 5.62 ± 0.09 times faster than 'sha1sum b1' 5.95 ± 0.10 times faster than 'sha256sum b1' 11.81 ± 0.21 times faster than 'b2sum b1' 13.17 ± 0.19 times faster than 'md5sum b1' still beating the dedicated sha extensions, but not nearly as dramatically.