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Gustavo Noronha Silva
e00ff6b108
This makes verbose comparison of 37MB completely different files 2.34x
faster than our own baseline, putting our cmp at almost 6x faster than
GNU cmp (/opt/homebrew/bin/cmp) on my M4 Pro Mac. The output remains
identical to that of GNU cmp. Mostly equal and smaller files do not
regress.
Benchmark 1: ./bin/baseline/diffutils cmp -lb t/huge t/eguh
Time (mean ± σ): 1.669 s ± 0.011 s [User: 1.594 s, System: 0.073 s]
Range (min … max): 1.654 s … 1.689 s 10 runs
Warning: Ignoring non-zero exit code.
Benchmark 2: ./target/release/diffutils cmp -lb t/huge t/eguh
Time (mean ± σ): 714.2 ms ± 4.1 ms [User: 629.3 ms, System: 82.7 ms]
Range (min … max): 707.2 ms … 721.5 ms 10 runs
Warning: Ignoring non-zero exit code.
Benchmark 3: /opt/homebrew/bin/cmp -lb t/huge t/eguh
Time (mean ± σ): 4.213 s ± 0.050 s [User: 4.128 s, System: 0.081 s]
Range (min … max): 4.160 s … 4.316 s 10 runs
Warning: Ignoring non-zero exit code.
Benchmark 4: /usr/bin/cmp -lb t/huge t/eguh
Time (mean ± σ): 3.892 s ± 0.048 s [User: 3.819 s, System: 0.070 s]
Range (min … max): 3.808 s … 3.976 s 10 runs
Warning: Ignoring non-zero exit code.
Summary
./target/release/diffutils cmp -lb t/huge t/eguh ran
2.34 ± 0.02 times faster than ./bin/baseline/diffutils cmp -lb t/huge t/eguh
5.45 ± 0.07 times faster than /usr/bin/cmp -lb t/huge t/eguh
5.90 ± 0.08 times faster than /opt/homebrew/bin/cmp -lb t/huge t/eguh