feat: add OpenSSL backend for checksum utilities#12412
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Add an optional OpenSSL (libcrypto) backend for md5/sha1/sha2-family digest computations. OpenSSL provides hand-tuned assembly implementations (AVX2, SSSE3, etc.) that are substantially faster than the pure-Rust crates on CPUs without SHA-NI hardware instructions. Benchmarks on Intel i9-7940X (no SHA-NI), 100MB file: sha256sum: 470ms -> 234ms (was 1.9x slower than GNU, now ~1.0x) sha1sum: 198ms -> 131ms (was 1.6x slower, now ~1.09x) sha512sum: 246ms -> 166ms (was 1.4x slower, now ~0.96x - faster!) md5sum: 185ms -> 174ms (was 1.2x slower, now ~1.09x) Closes uutils#12251
Contributor
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GNU testsuite comparison: |
xtqqczze
reviewed
May 21, 2026
| xattr = { workspace = true, optional = true } | ||
| # OpenSSL is only used on Unix targets. On Windows, enabling the `openssl` | ||
| # feature is a no-op and the pure-Rust digest implementations are used. | ||
| openssl = { workspace = true, optional = true } |
xtqqczze
reviewed
May 21, 2026
| # Use OpenSSL (libcrypto) for md5/sha1/sha2-family digests instead of the | ||
| # pure-Rust crates. This dramatically speeds up checksum utilities on CPUs | ||
| # without SHA-NI by using OpenSSL's optimized assembly implementations. | ||
| openssl = ["dep:openssl"] |
Contributor
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maybe add |
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Add an optional OpenSSL (libcrypto) backend for md5/sha1/sha2-family digest computations. OpenSSL provides hand-tuned assembly implementations (AVX2, SSSE3, etc.) that are substantially faster than the pure-Rust crates on CPUs without SHA-NI hardware instructions.
Benchmarks on Intel i9-7940X (no SHA-NI), 100MB file:
sha256sum: 470ms -> 234ms (was 1.9x slower than GNU, now ~1.0x)
sha1sum: 198ms -> 131ms (was 1.6x slower, now ~1.09x)
sha512sum: 246ms -> 166ms (was 1.4x slower, now ~0.96x - faster!)
md5sum: 185ms -> 174ms (was 1.2x slower, now ~1.09x)
Closes #12251