{
  "artifacts": [
    {
      "file": "9e4b518e0dd9c9a54b1098d367ce85a85a17c6e1b29e43e6f2f8e9496f8f034c.tflite",
      "sha256": "ed4ef4d37dc12a58e40e8d964d7cfac5d880def72b9431d504c4c3671d575ad9",
      "size_mb": 171.86
    }
  ],
  "benchmarks": [],
  "browser": {
    "backends": [
      {
        "backend": "wasm_xnnpack",
        "date": "2026-08-20",
        "env": {
          "browser": "chromium",
          "browser_version": "151.0.7922.34",
          "headless": true,
          "jspi": true,
          "litertjs_core_version": "2.5.3",
          "machine_label": "mac-studio-m4-max",
          "os": "macOS",
          "os_version": "27.0.0",
          "webgpu_adapter": {
            "architecture": "metal-3",
            "description": "",
            "device": "",
            "vendor": "apple"
          }
        },
        "full_delegation": null,
        "latency_p50_ms": null,
        "loads": true,
        "max_rel_diff": null,
        "output_match": null,
        "provenance": "measured",
        "runs": false
      },
      {
        "backend": "webgpu_mldrift",
        "date": "2026-08-20",
        "env": {
          "browser": "chromium",
          "browser_version": "151.0.7922.34",
          "headless": true,
          "jspi": true,
          "litertjs_core_version": "2.5.3",
          "machine_label": "mac-studio-m4-max",
          "os": "macOS",
          "os_version": "27.0.0",
          "webgpu_adapter": {
            "architecture": "metal-3",
            "description": "",
            "device": "",
            "vendor": "apple"
          }
        },
        "full_delegation": true,
        "latency_p50_ms": 51.323,
        "loads": true,
        "max_rel_diff": null,
        "output_match": null,
        "provenance": "measured",
        "runs": true
      }
    ],
    "demo_url": null,
    "sweep_source": "data/sweep/2.5.3/2026-08-20/wav2vec2-base-960h__w2v2_asr_head_fp16.json"
  },
  "conversion": {
    "command": "python build_w2v2_asr.py all",
    "quantization": "fp16",
    "tool": "litert-torch",
    "tool_version": "0.10.0"
  },
  "cross_runtime": [],
  "delegation": null,
  "device": {
    "records": [
      {
        "device": "raspberry-pi-5",
        "run": {
          "accelerator": "cpu_xnnpack",
          "context_length": null,
          "date": "2026-08-31",
          "decode_tokens_per_s": null,
          "delegated_ops": null,
          "env": {
            "device": "Raspberry Pi 5 Model B Rev 1.1",
            "machine_label": "raspberry-pi-5",
            "os_build": "Linux-6.18.34+rpt-rpi-2712-aarch64-with-glibc2.41",
            "runtime": "litert",
            "runtime_version": "2.2.0.dev20260804",
            "soc": null,
            "vendor_sdk": null
          },
          "error": null,
          "evidence": [
            "pi5 sweep row: LiteRT benchmark_model, CPU/XNNPACK at --num_threads=4, 3 invocations per file of 10 warm-up + 50 timed runs (the tool caps a phase at 150 s, so very slow graphs run fewer); latency = median of the three per-invocation medians over the timed phase; a row counts as measured only when every invocation exited 0 with XNNPACK engaged and vcgencmd get_throttled 0x0 before and after",
            "versions: ai-edge-litert-nightly=2.2.0.dev20260804, benchmark_model_sha256=babc9275addd8612caf0842294cb5b3f301c3cce46e6c5979cd2803f215f6bee, cpu=Raspberry Pi 5 Model B Rev 1.1, litert-cli-nightly=0.2.0.dev20260805, platform=Linux-6.18.34+rpt-rpi-2712-aarch64-with-glibc2.41, python=3.13.5",
            "invocation 0: exit=0 wall_s=169.7 temp 51.6->64.8C throttled=0x0 xnnpack=True median_us=2834190.0 runs=50 footprint_peak_mb=640.2",
            "invocation 1: exit=0 wall_s=167.5 temp 50.5->66.4C throttled=0x0 xnnpack=True median_us=2796772.0 runs=50 footprint_peak_mb=639.81",
            "invocation 2: exit=0 wall_s=169.3 temp 51.6->65.9C throttled=0x0 xnnpack=True median_us=2820028.0 runs=50 footprint_peak_mb=639.91"
          ],
          "failure_class": null,
          "full_delegation": null,
          "latency_p50_ms": 2820.028,
          "loads": true,
          "max_abs_diff": null,
          "max_rel_diff": null,
          "metrics": {
            "init_ms": 275.251,
            "invocations": 3,
            "iterations": 150,
            "latency_max_ms": 2920.108,
            "latency_min_ms": 2727.975,
            "threads": 4,
            "warmup_runs_per_invocation": 10
          },
          "output_match": null,
          "peak_mem_mb": 640.2,
          "prefill_tokens_per_s": null,
          "provenance": "measured",
          "runs": true,
          "total_ops": null,
          "ttft_ms": null
        },
        "source": "data/device_runs/2.2.0.dev20260804/2026-08-31/wav2vec2-base-960h__w2v2_asr_head_fp16__raspberry-pi-5.json"
      }
    ]
  },
  "model": {
    "family": "wav2vec2",
    "id": "wav2vec2-base-960h__w2v2_asr_head_fp16",
    "license": "apache-2.0",
    "source_url": "https://huggingface.co/litert-community/wav2vec2-base-960h-LiteRT",
    "task": "automatic-speech-recognition"
  },
  "pitfalls": [
    "Two-graph split (frontend conv feature extractor + transformer/CTC head); features hand off as [1,799,768] between the graphs — HF card I/O table.",
    "Fixed 16 s waveform window [1,256000]; greedy CTC decode on the host — HF card usage snippet."
  ],
  "schema_version": "1.2"
}