{
  "schema": "kotoba.public-domain-comparison.v2",
  "generatedAt": "2026-08-29T14:33:14.080Z",
  "repository": {
    "commit": "c08215294c132a58f8a622c9688e673fef9a578d",
    "dirty": false
  },
  "machine": {
    "os": "26.3.1",
    "architecture": "arm64",
    "cpu": "Apple M4",
    "logicalCpu": 10,
    "load1Before": 13.87,
    "load1After": 12.38
  },
  "qualification": {
    "qualified": false,
    "rule": "max(load1 before, load1 after) <= 0.75 * logical CPU count",
    "note": "Host load exceeded the publication gate; values are observations, not qualified rankings."
  },
  "method": {
    "runs": 7,
    "warmups": 1,
    "processBoundary": "Every sample starts a fresh process; concurrency workers are created inside that process.",
    "measurement": "processCold is wall-clock process startup plus workload execution. amortizedExecution runs a larger in-process batch and divides elapsed time by its workload-specific multiplier; it amortizes but does not fully remove process, VM, or module startup, and is not claimed as a perfectly warmed steady-state value. Compilation is excluded.",
    "correctness": "Every process-cold and amortized sample must print its independently scaled reference checksum exactly.",
    "scope": "Representative six-runtime comparison; targets, allocation models, JIT/AOT, and host contracts differ.",
    "kotobaFuel": 1048576
  },
  "kotobaOptimization": {
    "scope": "Pure unary inc/dec map chains consumed by a pure primitive reduce",
    "semantics": "Input collection is evaluated once; callbacks outside the proven subset retain eager materialization.",
    "structuralEvidence": "Fused HIR contains no vector-conj; the fallback regression retains vector-conj.",
    "revisions": {
      "sema": "8676e3d60a8372667b3b427b01d214f7684d443f",
      "amu": "1e9b99617871f19fc28fa1bba80fc17544571b64",
      "cli": "b94228d5e3d60d35fe1e642b7f52706a3426645e"
    }
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  "workloads": {
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      "amortizedMultiplier": 100,
      "expected": 6400,
      "contract": "For each iteration, concatenate 'kotoba-' and 'language', then add its character count and one when it contains 'lang'."
    },
    "collection": {
      "label": "Collection",
      "iterations": 8,
      "amortizedMultiplier": 1000,
      "expected": 1216,
      "contract": "Reuse a 16-element collection, map increment over it, and reduce by addition; one iteration returns 152."
    },
    "allocation": {
      "label": "Allocation",
      "iterations": 5,
      "amortizedMultiplier": 500,
      "expected": 760,
      "contract": "For each iteration, allocate a 16-element collection and two mapped collections, then reduce; one iteration returns 152."
    },
    "io": {
      "label": "I/O",
      "iterations": 12,
      "amortizedMultiplier": 3,
      "expected": 1604321280,
      "contract": "Read the same deterministic 1 MiB file 12 times and sum every unsigned byte."
    },
    "concurrency": {
      "label": "Concurrency",
      "iterations": 1000000,
      "amortizedMultiplier": 8,
      "expected": 4985653002,
      "contract": "Run four workers, each performing 1,000,000 wrapping 32-bit LCG steps from seeds 1..4, and sum the final unsigned states."
    },
    "realApp": {
      "label": "Real application",
      "iterations": 8,
      "amortizedMultiplier": 1000,
      "expected": 64,
      "contract": "Evaluate a fixed 16-request risk batch against an admission threshold and count admitted requests; one batch returns 8."
    }
  },
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