{
  "version": 1,
  "captured": "2026-05-09",
  "captured_via": "bench/cross_lang.py",
  "note": "Cross-language wall-time baseline. Per-fixture: AILang at --alloc=rc, AILang at --alloc=bump, hand-C at clang -O2. Ratios rc/c and bump/c are the headline answer to CLAUDE.md's LLVM-linkable performance claim. The C reference uses malloc-and-leak to mirror AILang's implicit-mode RC; an explicit-mode + free() variant is queued. Tolerance convention: sub-millisecond fixtures (e.g. bench_compute_intsum at ~0.4 ms; LLVM-folds the loop to a single printf) have wider per-run jitter than dominant-runtime fixtures because subprocess spawn / kernel-page warmup is a larger relative share. The intsum fixture's tolerances are widened to absorb that — codified in 21'g after the false-positive at 15%/12%.",
  "fixtures": {
    "bench_list_sum": {
      "ail_rc_s": {
        "baseline": 0.138906,
        "tolerance_pct": 15
      },
      "ail_bump_s": {
        "baseline": 0.050245,
        "tolerance_pct": 15
      },
      "c_s": {
        "baseline": 0.09749,
        "tolerance_pct": 15
      },
      "rc_over_c": {
        "baseline": 1.42483,
        "tolerance_pct": 12
      },
      "bump_over_c": {
        "baseline": 0.515393,
        "tolerance_pct": 12
      }
    },
    "bench_tree_walk": {
      "ail_rc_s": {
        "baseline": 0.100173,
        "tolerance_pct": 15
      },
      "ail_bump_s": {
        "baseline": 0.038673,
        "tolerance_pct": 15
      },
      "c_s": {
        "baseline": 0.036567,
        "tolerance_pct": 15
      },
      "rc_over_c": {
        "baseline": 2.739449,
        "tolerance_pct": 12
      },
      "bump_over_c": {
        "baseline": 1.057606,
        "tolerance_pct": 12
      }
    },
    "bench_compute_intsum": {
      "ail_rc_s": {
        "baseline": 0.000362,
        "tolerance_pct": 35
      },
      "ail_bump_s": {
        "baseline": 0.000371,
        "tolerance_pct": 35
      },
      "c_s": {
        "baseline": 0.000361,
        "tolerance_pct": 35
      },
      "rc_over_c": {
        "baseline": 1.002676,
        "tolerance_pct": 35
      },
      "bump_over_c": {
        "baseline": 1.028255,
        "tolerance_pct": 35
      }
    },
    "bench_compute_collatz": {
      "ail_rc_s": {
        "baseline": 0.057994,
        "tolerance_pct": 15
      },
      "ail_bump_s": {
        "baseline": 0.057159,
        "tolerance_pct": 15
      },
      "c_s": {
        "baseline": 0.05776,
        "tolerance_pct": 15
      },
      "rc_over_c": {
        "baseline": 1.00405,
        "tolerance_pct": 12
      },
      "bump_over_c": {
        "baseline": 0.989593,
        "tolerance_pct": 12
      }
    },
    "bench_list_sum_explicit": {
      "ail_rc_s": {
        "baseline": 0.150754,
        "tolerance_pct": 15
      },
      "ail_bump_s": {
        "baseline": 0.0495,
        "tolerance_pct": 15
      },
      "c_s": {
        "baseline": 0.119204,
        "tolerance_pct": 15
      },
      "rc_over_c": {
        "baseline": 1.264667,
        "tolerance_pct": 12
      },
      "bump_over_c": {
        "baseline": 0.415253,
        "tolerance_pct": 12
      }
    }
  }
}