mirror: A fast canonicalisation utility for stable object equality
chore: adds swr/_internal/stableHash as a candidate
Marais Rossouw
(Jun 30, 2026, 4:27 PM +1000)
fbb5c5c2
68418246
+91
-78
+13
-5
lib/mod.bench.ts
+13
-5
lib/mod.bench.ts
···
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lib: () => import('npm:@tufjs/canonical-json@^2.0'),
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run: (m, o) => m.canonicalize(o),
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},
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'swr/_internal/stableHash': {
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lib: () => import('npm:swr@^2.4/_internal'),
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run: (m, o) => m.stableHash(o),
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},
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};
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const mods: Record<string, any> = {};
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for (const [name, c] of Object.entries(candidates)) mods[name] = await c.lib();
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const fixtures = Object.entries(scenarios).map(([name, make]) => [name, make()] as const);
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-
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for (const [scenario, value] of fixtures) {
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for (const [scenario, value] of Object.entries(scenarios)) {
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for (const [name, c] of Object.entries(candidates)) {
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// Validate up front: a throw (can't handle the shape) or non-deterministic
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// output marks the bench ignored, so it's skipped instead of measured.
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let valid = false;
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try {
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valid = c.run(mods[name], value) === c.run(mods[name], value);
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let o = value();
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valid = c.run(mods[name], o) === c.run(mods[name], o);
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} catch {
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/* leaves valid false -> ignored */
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}
···
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group: scenario,
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baseline: name === 'object-identity',
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ignore: !valid,
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fn: () => void c.run(mods[name], value),
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fn: (ctx) => {
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let o = value();
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ctx.start();
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let _ = c.run(mods[name], o)
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ctx.end();
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}
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});
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}
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}
+78
-73
readme.md
+78
-73
readme.md
···
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<!-- BEGIN BENCHMARK -->
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```
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-
✔ simple ~ 1.1µs @ 932,332 ops/sec ± 0.76%
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✔ deep ~ 8.0µs @ 124,505 ops/sec ± 2.85%
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✔ deep circular ~ 5.5µs @ 183,042 ops/sec ± 0.16%
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✔ big ~ 80.2µs @ 12,467 ops/sec ± 0.42%
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✔ leafy ~ 23.7µs @ 42,223 ops/sec ± 0.63%
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✔ simple ~ 1.1µs @ 870,271 ops/sec ± 0.22%
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✔ deep ~ 8.4µs @ 118,807 ops/sec ± 0.01%
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✔ deep circular ~ 6.0µs @ 166,470 ops/sec ± 0.51%
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✔ big ~ 82.1µs @ 12,175 ops/sec ± 1.06%
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✔ leafy ~ 23.8µs @ 41,957 ops/sec ± 0.70%
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```
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<details><summary>All candidates</summary>
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```
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simple
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-
✔ object-identity ~ 1.1µs @ 932,332 ops/sec ± 0.76%
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✔ safe-stable-stringify ~ 1.7µs @ 588,871 ops/sec ± 0.67%
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✔ ohash ~ 3.5µs @ 285,750 ops/sec ± 0.28%
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✔ object-hash ~ 9.7µs @ 102,617 ops/sec ± 2.08%
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✔ hash-it † ~ 2.8µs @ 361,547 ops/sec ± 2.62%
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✔ json-stable-stringify ~ 3.1µs @ 325,737 ops/sec ± 0.08%
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✔ fast-json-stable-stringify ~ 2.1µs @ 480,206 ops/sec ± 0.44%
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✔ tiny-stable-stringify ~ 2.4µs @ 409,949 ops/sec ± 1.60%
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✔ json-stringify-deterministic ~ 3.1µs @ 326,067 ops/sec ± 2.55%
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✔ json-stable-stringify-without-jsonify ~ 3.0µs @ 329,660 ops/sec ± 0.25%
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✔ json-sorted-stringify ~ 2.3µs @ 429,194 ops/sec ± 0.54%
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✔ canonicalize ~ 3.5µs @ 284,416 ops/sec ± 1.62%
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✔ object-identity ~ 1.1µs @ 870,271 ops/sec ± 0.22%
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✔ safe-stable-stringify ~ 1.8µs @ 563,781 ops/sec ± 0.46%
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✔ ohash ~ 3.8µs @ 262,901 ops/sec ± 0.25%
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✔ object-hash ~ 10.2µs @ 98,164 ops/sec ± 1.84%
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✔ hash-it † ~ 3.0µs @ 335,235 ops/sec ± 2.05%
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✔ json-stable-stringify ~ 3.1µs @ 317,679 ops/sec ± 0.30%
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✔ fast-json-stable-stringify ~ 2.1µs @ 471,606 ops/sec ± 0.22%
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✔ tiny-stable-stringify ~ 2.5µs @ 403,418 ops/sec ± 1.49%
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+
✔ json-stringify-deterministic ~ 3.2µs @ 313,455 ops/sec ± 0.63%
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+
✔ json-stable-stringify-without-jsonify ~ 3.2µs @ 312,450 ops/sec ± 0.59%
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✔ json-sorted-stringify ~ 2.4µs @ 411,299 ops/sec ± 0.86%
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✔ canonicalize ~ 3.7µs @ 271,025 ops/sec ± 0.17%
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✔ swr/_internal/stableHash ~ 3.9µs @ 255,223 ops/sec ± 0.60%
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✘ @tufjs/canonical-json
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─────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.58x faster than safe-stable-stringify)
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──────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.54x faster than safe-stable-stringify)
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deep
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✔ object-identity ~ 8.0µs @ 124,505 ops/sec ± 2.85%
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✔ safe-stable-stringify ~ 13.6µs @ 73,292 ops/sec ± 0.45%
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✔ ohash ~ 25.6µs @ 39,078 ops/sec ± 0.79%
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✔ object-hash ~ 53.3µs @ 18,748 ops/sec ± 1.73%
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✔ hash-it † ~ 21.1µs @ 47,506 ops/sec ± 1.23%
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✔ json-stable-stringify ~ 22.9µs @ 43,649 ops/sec ± 1.24%
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✔ fast-json-stable-stringify ~ 14.4µs @ 69,262 ops/sec ± 0.14%
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✔ tiny-stable-stringify ~ 16.4µs @ 60,994 ops/sec ± 0.38%
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✔ json-stringify-deterministic ~ 22.5µs @ 44,468 ops/sec ± 1.25%
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✔ json-stable-stringify-without-jsonify ~ 22.7µs @ 43,964 ops/sec ± 0.53%
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✔ json-sorted-stringify ~ 16.1µs @ 61,935 ops/sec ± 0.64%
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✔ canonicalize ~ 26.7µs @ 37,508 ops/sec ± 0.76%
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✔ @tufjs/canonical-json ~ 34.5µs @ 29,020 ops/sec ± 1.45%
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──────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.70x faster than safe-stable-stringify)
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✔ object-identity ~ 8.4µs @ 118,807 ops/sec ± 0.01%
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✔ safe-stable-stringify ~ 13.3µs @ 75,024 ops/sec ± 0.66%
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✔ ohash ~ 26.0µs @ 38,497 ops/sec ± 0.57%
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✔ object-hash ~ 56.2µs @ 17,807 ops/sec ± 0.95%
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✔ hash-it † ~ 22.8µs @ 43,812 ops/sec ± 0.14%
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✔ json-stable-stringify ~ 24.1µs @ 41,487 ops/sec ± 0.95%
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✔ fast-json-stable-stringify ~ 14.2µs @ 70,522 ops/sec ± 0.39%
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✔ tiny-stable-stringify ~ 16.1µs @ 62,039 ops/sec ± 0.56%
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✔ json-stringify-deterministic ~ 23.2µs @ 43,102 ops/sec ± 0.15%
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✔ json-stable-stringify-without-jsonify ~ 23.3µs @ 42,858 ops/sec ± 0.18%
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✔ json-sorted-stringify ~ 15.8µs @ 63,287 ops/sec ± 0.73%
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✔ canonicalize ~ 26.8µs @ 37,383 ops/sec ± 0.16%
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✔ swr/_internal/stableHash ~ 29.0µs @ 34,460 ops/sec ± 22.90%
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✔ @tufjs/canonical-json ~ 34.9µs @ 28,625 ops/sec ± 0.17%
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───────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.58x faster than safe-stable-stringify)
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deep circular
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✔ object-identity ~ 5.5µs @ 183,042 ops/sec ± 0.16%
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✔ safe-stable-stringify ~ 7.2µs @ 139,264 ops/sec ± 0.32%
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✔ ohash ~ 16.6µs @ 60,357 ops/sec ± 0.66%
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✔ object-hash ~ 44.1µs @ 22,688 ops/sec ± 1.50%
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✔ hash-it † ~ 15.1µs @ 66,295 ops/sec ± 1.39%
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✔ object-identity ~ 6.0µs @ 166,470 ops/sec ± 0.51%
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✔ safe-stable-stringify ~ 7.5µs @ 132,624 ops/sec ± 0.27%
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✔ ohash ~ 17.2µs @ 58,116 ops/sec ± 0.49%
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✔ object-hash ~ 45.7µs @ 21,863 ops/sec ± 0.07%
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✔ hash-it † ~ 16.1µs @ 61,985 ops/sec ± 0.31%
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✘ json-stable-stringify
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✔ fast-json-stable-stringify ~ 10.0µs @ 100,160 ops/sec ± 0.67%
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✔ fast-json-stable-stringify ~ 10.2µs @ 97,666 ops/sec ± 0.51%
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✘ tiny-stable-stringify
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✔ json-stringify-deterministic ~ 14.8µs @ 67,354 ops/sec ± 1.50%
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✔ json-stringify-deterministic ~ 15.5µs @ 64,604 ops/sec ± 0.41%
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✘ json-stable-stringify-without-jsonify
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✘ json-sorted-stringify
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✘ canonicalize
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✔ swr/_internal/stableHash ~ 15.4µs @ 65,066 ops/sec ± 21.11%
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✘ @tufjs/canonical-json
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──────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.31x faster than safe-stable-stringify)
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───────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.26x faster than safe-stable-stringify)
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big
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✔ object-identity ~ 80.2µs @ 12,467 ops/sec ± 0.42%
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✔ safe-stable-stringify ~ 135.1µs @ 7,404 ops/sec ± 0.88%
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✔ ohash ~ 289.9µs @ 3,449 ops/sec ± 0.63%
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✔ object-hash ~ 490.0µs @ 2,041 ops/sec ± 1.51%
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✔ hash-it † ~ 258.9µs @ 3,862 ops/sec ± 0.48%
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✔ json-stable-stringify ~ 214.5µs @ 4,662 ops/sec ± 0.69%
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✔ fast-json-stable-stringify ~ 156.8µs @ 6,379 ops/sec ± 0.69%
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✔ tiny-stable-stringify ~ 174.3µs @ 5,736 ops/sec ± 0.24%
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✔ json-stringify-deterministic ~ 223.6µs @ 4,471 ops/sec ± 0.38%
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✔ json-stable-stringify-without-jsonify ~ 215.6µs @ 4,639 ops/sec ± 0.21%
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✔ json-sorted-stringify ~ 165.3µs @ 6,049 ops/sec ± 0.13%
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✔ canonicalize ~ 245.5µs @ 4,073 ops/sec ± 0.44%
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✔ @tufjs/canonical-json ~ 369.7µs @ 2,705 ops/sec ± 0.11%
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──────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.68x faster than safe-stable-stringify)
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✔ object-identity ~ 82.1µs @ 12,175 ops/sec ± 1.06%
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✔ safe-stable-stringify ~ 140.5µs @ 7,118 ops/sec ± 0.04%
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✔ ohash ~ 304.4µs @ 3,285 ops/sec ± 0.53%
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✔ object-hash ~ 513.2µs @ 1,949 ops/sec ± 1.23%
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✔ hash-it † ~ 276.5µs @ 3,617 ops/sec ± 0.61%
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✔ json-stable-stringify ~ 228.2µs @ 4,382 ops/sec ± 1.06%
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✔ fast-json-stable-stringify ~ 164.2µs @ 6,091 ops/sec ± 0.56%
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✔ tiny-stable-stringify ~ 180.0µs @ 5,556 ops/sec ± 1.08%
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✔ json-stringify-deterministic ~ 224.9µs @ 4,447 ops/sec ± 1.01%
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✔ json-stable-stringify-without-jsonify ~ 224.1µs @ 4,463 ops/sec ± 0.66%
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✔ json-sorted-stringify ~ 172.5µs @ 5,797 ops/sec ± 0.21%
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✔ canonicalize ~ 262.7µs @ 3,807 ops/sec ± 1.01%
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✔ swr/_internal/stableHash ~ 287.7µs @ 3,476 ops/sec ± 16.90%
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✔ @tufjs/canonical-json ~ 387.7µs @ 2,580 ops/sec ± 0.32%
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───────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.71x faster than safe-stable-stringify)
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leafy
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✔ object-identity ~ 23.7µs @ 42,223 ops/sec ± 0.63%
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✔ safe-stable-stringify ~ 51.0µs @ 19,622 ops/sec ± 0.66%
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✔ ohash ~ 30.6µs @ 32,645 ops/sec ± 0.38%
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✔ object-hash ~ 82.1µs @ 12,183 ops/sec ± 0.10%
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✔ hash-it † ~ 83.0µs @ 12,050 ops/sec ± 0.42%
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✔ json-stable-stringify ~ 113.6µs @ 8,800 ops/sec ± 0.02%
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✔ fast-json-stable-stringify ~ 59.2µs @ 16,901 ops/sec ± 1.06%
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✔ tiny-stable-stringify ~ 103.5µs @ 9,661 ops/sec ± 0.11%
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✔ json-stringify-deterministic ~ 111.5µs @ 8,965 ops/sec ± 0.00%
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✔ json-stable-stringify-without-jsonify ~ 113.7µs @ 8,796 ops/sec ± 2.00%
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✔ json-sorted-stringify ~ 107.3µs @ 9,324 ops/sec ± 0.97%
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✔ canonicalize ~ 92.4µs @ 10,821 ops/sec ± 1.36%
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✔ @tufjs/canonical-json ~ 207.2µs @ 4,826 ops/sec ± 0.72%
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──────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.29x faster than ohash)
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✔ object-identity ~ 23.8µs @ 41,957 ops/sec ± 0.70%
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✔ safe-stable-stringify ~ 50.3µs @ 19,896 ops/sec ± 0.47%
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✔ ohash ~ 30.9µs @ 32,336 ops/sec ± 0.38%
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✔ object-hash ~ 87.7µs @ 11,397 ops/sec ± 1.27%
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✔ hash-it † ~ 84.3µs @ 11,860 ops/sec ± 0.97%
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✔ json-stable-stringify ~ 115.1µs @ 8,686 ops/sec ± 0.87%
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✔ fast-json-stable-stringify ~ 59.6µs @ 16,765 ops/sec ± 0.11%
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✔ tiny-stable-stringify ~ 107.8µs @ 9,277 ops/sec ± 0.23%
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✔ json-stringify-deterministic ~ 116.5µs @ 8,583 ops/sec ± 0.29%
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✔ json-stable-stringify-without-jsonify ~ 117.2µs @ 8,532 ops/sec ± 0.35%
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✔ json-sorted-stringify ~ 107.9µs @ 9,266 ops/sec ± 0.15%
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✔ canonicalize ~ 93.3µs @ 10,720 ops/sec ± 0.50%
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✔ swr/_internal/stableHash ~ 134.1µs @ 7,459 ops/sec ± 31.44%
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✔ @tufjs/canonical-json ~ 217.2µs @ 4,605 ops/sec ± 1.07%
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───────────────────────────────────────────────────────────────────────────
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⭐︎ object-identity (1.30x faster than ohash)
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```
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</details>