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feat(hash): generate the SMHasher3 Results table (+ compact column, parser fix) #255

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Merged
helly25 merged 4 commits into from
Jul 12, 2026
Merged

feat(hash): generate the SMHasher3 Results table (+ compact column, parser fix) #255

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c29e04c
docs(hash): compact the SMHasher3 result column
helly25 Jul 12, 2026
6db5574
Merge remote-tracking branch 'origin/main' into docs/hash-results-column
helly25 Jul 12, 2026
0a006ae
feat(hash): generate the SMHasher3 Results table; fix result parsing
helly25 Jul 12, 2026
33a0ee9
feat(hash): alias legacy SMHasher3 names when loading measured data
helly25 Jul 12, 2026
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3 changes: 3 additions & 0 deletions CHANGELOG.md
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@@ -1,5 +1,8 @@
# 0.13.2

- Added the `quality` command to `hash_benchmark_report.py`: it generates the SMHasher3 "Results" table in `mbo/hash/README.md` from a curated source (verify with `--check`, source measured verdict/score from a fresh run with `--smhasher <bundle>`).
- Fixed SMHasher3 result parsing so an invalid hash name or crash reads as `ERROR` instead of a false `PASS`, and the pass/fail score and failing families now parse from the run Summary; legacy/short SMHasher3 names are aliased to their registered form when a measured dataset is loaded.

# 0.13.1

- Switched the build-seed mangle constant header to per-build generation (no longer committed): removed `internal/hash_mangle_seed.h.in` and `hash_mangle_seed_default_test`, so a version bump no longer needs a committed regeneration. `hash_mangle.h` includes the generated header directly (missing is an `#error`; clangd falls back under `-DIS_CLANGD`).
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26 changes: 16 additions & 10 deletions mbo/hash/README.md
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Expand Up @@ -428,18 +428,24 @@ numbers are directly comparable.

### Results

<!-- BEGIN SMHasher3 results (generated by `hash_benchmark_report.py quality`; DO NOT EDIT) -->

| Algorithm | Bits | Role in mbo/hash | SMHasher3 result | Failures |
| ----------- | ---: | ------------------------- | ---------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `dumbo` | 64 | `hash.h` (compact MUM) | PASS - 188 / 188 | none |
| `fnv1a` | 64 | `hash.h` | FAIL - 7 / 186 | nearly every family: Avalanche, BIC, Sparse, Cyclic, Permutation, Text, TwoBytes, Bitflip, PerlinNoise, and the complete Seed* cluster |
| `mumbo` | 64 | default (64/32/streaming) | PASS - 188 / 188 | none |
| `rapidhash` | 64 | extra (`hash_extra_cc`) | PASS - 188 / 188 | none |
| `siphash` | 64 | `hash.h` (keyed PRF) | PASS - 186 / 186 | none |
| `xxh3` | 64 | extra (`hash_extra_cc`) | FAIL - 166 / 188 | BIC [3, 8, 11], Sparse [20/3], PerlinNoise [2], Bitflip [8], SeedZeroes [1280, 8448], SeedSparse [2, 3] |
| `xxh64` | 64 | extra (`hash_extra_cc`) | FAIL - 181 / 188 | SeedBlockLen [15, 19, 21, 26, 29, 30], SeedBIC [8] |
| `jumbo` | 128 | default (128) | PASS - 188 / 188 | none |
| `murmur3` | 128 | `hash.h` | FAIL - 123 / 188 | BIC, Zeroes, Permutation, and the complete Seed* cluster (11 families) |
| `xxh3` | 128 | extra (`hash_extra_cc`) | FAIL - 162 / 188 | BIC [3, 8, 15], Sparse [20/3], PerlinNoise [2], Bitflip [3, 4, 8], SeedZeroes [1280, 8448], SeedSparse [2, 3], SeedBlockLen [8, 12-16], SeedBlockOffset [0-5], SeedBIC [3, 8] |
| `dumbo` | 64 | `hash.h` (compact MUM) | PASS | none |
| `fnv1a` | 64 | `hash.h` | 7/186 | nearly every family: Avalanche, BIC, Sparse, Cyclic, Permutation, Text, TwoBytes, Bitflip, PerlinNoise, and the complete Seed* cluster |
| `mumbo` | 64 | default (64/32/streaming) | PASS | none |
| `rapidhash` | 64 | extra (`hash_extra_cc`) | PASS | none |
| `siphash` | 64 | `hash.h` (keyed PRF) | PASS | none |
| `xxh3` | 64 | extra (`hash_extra_cc`) | 166/188 | BIC [3, 8, 11], Sparse [20/3], PerlinNoise [2], Bitflip [8], SeedZeroes [1280, 8448], SeedSparse [2, 3] |
| `xxh64` | 64 | extra (`hash_extra_cc`) | 181/188 | SeedBlockLen [15, 19, 21, 26, 29, 30], SeedBIC [8] |
| `jumbo` | 128 | default (128) | PASS | none |
| `murmur3` | 128 | `hash.h` | 123/188 | BIC, Zeroes, Permutation, and the complete Seed* cluster (11 families) |
| `xxh3` | 128 | extra (`hash_extra_cc`) | 162/188 | BIC [3, 8, 15], Sparse [20/3], PerlinNoise [2], Bitflip [3, 4, 8], SeedZeroes [1280, 8448], SeedSparse [2, 3], SeedBlockLen [8, 12-16], SeedBlockOffset [0-5], SeedBIC [3, 8] |

<!-- END SMHasher3 results -->

The `SMHasher3 result` column shows `PASS` when every test passes, otherwise the failing `passed/total` count (e.g. `7/186`).

Reading the results:

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