{
  "schema_version": "1.0",
  "publisher": "Attractor Dynamics Inc.",
  "audience": ["search engines", "AI agents", "researchers"],
  "human_navigation": false,
  "updated": "2026-07-13",
  "documents": [
    {
      "id": "mps-custom-kernel-local-2026-07-13",
      "type": "measurement-note",
      "title": "Local MPS custom-kernel measurement",
      "url": "https://www.attractordynamics.ai/research/mps-custom-kernel-2026-07-13.md",
      "html_context": "https://www.attractordynamics.ai/matrix-kernels/",
      "language": "en",
      "tags": ["Apple M5 Pro", "Metal 4", "MPS", "3x3", "4x4", "CUDA", "recurrent scan", "real-pair tensors"],
      "hardware": {
        "machine": "MacBook Pro Mac17,9",
        "chip": "Apple M5 Pro",
        "gpu_cores": 16,
        "memory_gb": 24,
        "metal": "Metal 4",
        "pytorch": "2.8.0",
        "dtype": "float32"
      },
      "headline_measurements": [
        {"name": "qutrit_sidecar_fused_step_ms", "value": 8.312, "shape": "B32 T128 slots64 input_dim1453"},
        {"name": "qutrit_sidecar_inline_step_ms", "value": 182.315, "shape": "B32 T128 slots64 input_dim1453"},
        {"name": "qutrit_sidecar_speedup", "value": 21.93, "unit": "x", "comparison": "inline metal / metal_fused"},
        {"name": "ququart_native_forward_speedup", "value": 82.3, "unit": "x", "comparison": "real-pair PyTorch reference / mps_native"},
        {"name": "ququart_native_backward_speedup", "value": 120.3, "unit": "x", "comparison": "real-pair PyTorch reference / mps_native"}
      ],
      "parity": {
        "state_max_abs": 2.12e-6,
        "carry_max_abs": 2.09e-6,
        "controller_weight_grad_max_abs": 1.35e-10,
        "focused_tests": "26 passed"
      },
      "limitations": [
        "Synthetic timing probes are not corpus-quality or birth-run results.",
        "The qutrit sidecar is opt-in and separate from canonical SINABRO wiring.",
        "FP16/BF16 precision modes remain quality-gated experiments.",
        "The comparison is device- and shape-specific, not a universal hardware ranking."
      ]
    }
  ]
}