{
  "version": 1,
  "captured": "2026-05-09",
  "captured_via": "bench/run.sh -n 5",
  "note": "Baseline for bench/check.py regression detection. Decision-10 thresholds (rc/bump <= 1.3x throughput, p99/median <= 5x latency) are LANGUAGE invariants, not regression-check tolerances. The tolerances below are tuned to absorb run-to-run noise on a quiet developer machine; they are NOT the correctness bar. To update after an intentional change, re-run bench/run.sh and replace the values, recording the reason in the JOURNAL entry that ships the baseline bump. Tolerance convention: max-of-distribution metrics (e.g. *.max_us) get a wider band than percentile metrics (p99, p99_9) because the maximum of a 1000-sample tail-latency distribution has wider natural run-to-run dispersion than a percentile-of-distribution does — codified after the 21'd implicit_at_rc.max_us 25%->30% recalibration.",

  "throughput": {
    "bench_list_sum": {
      "gc_s":          { "baseline": 0.137,  "tolerance_pct": 10 },
      "bump_s":        { "baseline": 0.046,  "tolerance_pct": 10 },
      "rc_s":          { "baseline": 0.133,  "tolerance_pct": 10 },
      "gc_over_bump":  { "baseline": 2.98,   "tolerance_pct": 8  },
      "rc_over_bump":  { "baseline": 2.89,   "tolerance_pct": 8  },
      "gc_rss_kb":     { "baseline": 103980, "tolerance_pct": 5  },
      "bump_rss_kb":   { "baseline": 97696,  "tolerance_pct": 5  },
      "rc_rss_kb":     { "baseline": 193448, "tolerance_pct": 5  }
    },
    "bench_tree_walk": {
      "gc_s":          { "baseline": 0.103,  "tolerance_pct": 10 },
      "bump_s":        { "baseline": 0.038,  "tolerance_pct": 10 },
      "rc_s":          { "baseline": 0.095,  "tolerance_pct": 10 },
      "gc_over_bump":  { "baseline": 2.71,   "tolerance_pct": 8  },
      "rc_over_bump":  { "baseline": 2.50,   "tolerance_pct": 8  },
      "gc_rss_kb":     { "baseline": 73260,  "tolerance_pct": 5  },
      "bump_rss_kb":   { "baseline": 55208,  "tolerance_pct": 5  },
      "rc_rss_kb":     { "baseline": 108956, "tolerance_pct": 5  }
    },
    "bench_closure_chain": {
      "gc_s":          { "baseline": 0.013,  "tolerance_pct": 25 },
      "bump_s":        { "baseline": 0.007,  "tolerance_pct": 25 },
      "rc_s":          { "baseline": 0.029,  "tolerance_pct": 20 },
      "gc_over_bump":  { "baseline": 1.86,   "tolerance_pct": 15 },
      "rc_over_bump":  { "baseline": 4.14,   "tolerance_pct": 15 },
      "gc_rss_kb":     { "baseline": 13688,  "tolerance_pct": 15 },
      "bump_rss_kb":   { "baseline": 15836,  "tolerance_pct": 15 },
      "rc_rss_kb":     { "baseline": 39644,  "tolerance_pct": 10 }
    },
    "bench_hof_pipeline": {
      "gc_s":          { "baseline": 0.134,  "tolerance_pct": 10 },
      "bump_s":        { "baseline": 0.048,  "tolerance_pct": 10 },
      "rc_s":          { "baseline": 0.136,  "tolerance_pct": 10 },
      "gc_over_bump":  { "baseline": 2.79,   "tolerance_pct": 8  },
      "rc_over_bump":  { "baseline": 2.83,   "tolerance_pct": 8  },
      "gc_rss_kb":     { "baseline": 103788, "tolerance_pct": 5  },
      "bump_rss_kb":   { "baseline": 97448,  "tolerance_pct": 5  },
      "rc_rss_kb":     { "baseline": 193640, "tolerance_pct": 5  }
    },
    "bench_compute_collatz": {
      "gc_s":          { "baseline": 0.057,  "tolerance_pct": 12 },
      "bump_s":        { "baseline": 0.056,  "tolerance_pct": 12 },
      "rc_s":          { "baseline": 0.056,  "tolerance_pct": 12 },
      "gc_over_bump":  { "baseline": 1.02,   "tolerance_pct": 10 },
      "rc_over_bump":  { "baseline": 1.00,   "tolerance_pct": 10 },
      "gc_rss_kb":     { "baseline": 13624,  "tolerance_pct": 15 },
      "bump_rss_kb":   { "baseline": 13860,  "tolerance_pct": 15 },
      "rc_rss_kb":     { "baseline": 13880,  "tolerance_pct": 15 }
    },
    "bench_list_sum_explicit": {
      "gc_s":          { "baseline": 0.139,  "tolerance_pct": 10 },
      "bump_s":        { "baseline": 0.048,  "tolerance_pct": 10 },
      "rc_s":          { "baseline": 0.152,  "tolerance_pct": 10 },
      "gc_over_bump":  { "baseline": 2.89,   "tolerance_pct": 8  },
      "rc_over_bump":  { "baseline": 3.14,   "tolerance_pct": 8  },
      "gc_rss_kb":     { "baseline": 103772, "tolerance_pct": 5  },
      "bump_rss_kb":   { "baseline": 97636,  "tolerance_pct": 5  },
      "rc_rss_kb":     { "baseline": 142424, "tolerance_pct": 8  }
    }
  },

  "latency": {
    "implicit_at_gc": {
      "median_us":       { "baseline": 96.4,   "tolerance_pct": 15 },
      "p99_us":          { "baseline": 7130.0, "tolerance_pct": 20 },
      "p99_9_us":        { "baseline": 8131.2, "tolerance_pct": 25 },
      "max_us":          { "baseline": 8343.7, "tolerance_pct": 25 },
      "p99_over_median": { "baseline": 73.92,  "tolerance_pct": 20 }
    },
    "explicit_at_rc": {
      "median_us":       { "baseline": 213.9,  "tolerance_pct": 15 },
      "p99_us":          { "baseline": 357.5,  "tolerance_pct": 25 },
      "p99_9_us":        { "baseline": 404.1,  "tolerance_pct": 25 },
      "max_us":          { "baseline": 413.0,  "tolerance_pct": 25 },
      "p99_over_median": { "baseline": 1.66,   "tolerance_pct": 25 }
    },
    "implicit_at_rc": {
      "median_us":       { "baseline": 285.7,  "tolerance_pct": 15 },
      "p99_us":          { "baseline": 407.1,  "tolerance_pct": 20 },
      "p99_9_us":        { "baseline": 452.0,  "tolerance_pct": 25 },
      "max_us":          { "baseline": 477.3,  "tolerance_pct": 30 },
      "p99_over_median": { "baseline": 1.43,   "tolerance_pct": 20 }
    }
  }
}