{
  "config": {
    "input_seed": 42,
    "timed_runs": 10,
    "tolerance_abs": 0.00001,
    "tolerance_rel": 0.001,
    "warmup_runs": 3
  },
  "input_spec": "1x80x500:float32",
  "license": "cc-by-4.0",
  "model_id": "parakeet-tdt_ctc-0.6b-ja__parakeet_tdt_ctc_0.6b_ja_5s_i8",
  "notes": "multi-signature model (122 subgraphs); harness runs subgraph 0 (encode)",
  "results": [
    {
      "backend": "wasm_xnnpack",
      "date": "2026-08-13",
      "delegation_evidence": [
        "error: WARNING: [npu_registry.cc:34] NPU accelerator could not be loaded and registered: kLiteRtStatusErrorInvalidArgument.",
        "error: WARNING: [npu_registry.cc:34] NPU accelerator could not be loaded and registered: kLiteRtStatusErrorInvalidArgument."
      ],
      "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"
        }
      },
      "error": null,
      "failure_class": null,
      "full_delegation": null,
      "latency_p50_ms": 1184.507,
      "loads": true,
      "max_abs_diff": null,
      "max_rel_diff": null,
      "output_match": null,
      "provenance": "measured",
      "runs": true
    },
    {
      "backend": "webgpu_mldrift",
      "date": "2026-08-13",
      "delegation_evidence": [
        "error: WARNING: [npu_registry.cc:34] NPU accelerator could not be loaded and registered: kLiteRtStatusErrorInvalidArgument.",
        "error: WARNING: [npu_registry.cc:34] NPU accelerator could not be loaded and registered: kLiteRtStatusErrorInvalidArgument.",
        "warning: W0813 06:48:45.849999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:45.888999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:45.908999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:45.931000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:45.942000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:45.961999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:45.972000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:45.992999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.004000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.024999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.036000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.056999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.067000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.087000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.097999  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "warning: W0813 06:48:46.118000  755312 gpu_model_builder.cc:3820] Shape mismatch in GpuModelBuilder::UpdateOutputTensors(output of convolution1x1(conv_generic)). Requested shape:{bhwdc, {63, 1, 1, 1, 1024}} vs reference shape: {bhwdc, {1, 1, 63, 1, 1024}}",
        "error: Aborted()"
      ],
      "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"
        }
      },
      "error": "RuntimeError: Aborted(). Build with -sASSERTIONS for more info.",
      "failure_class": "compile_error",
      "full_delegation": null,
      "latency_p50_ms": null,
      "loads": false,
      "max_abs_diff": null,
      "max_rel_diff": null,
      "output_match": null,
      "provenance": "measured",
      "runs": false
    }
  ],
  "schema_version": "1.0",
  "source": "https://huggingface.co/litert-community/parakeet-tdt_ctc-0.6b-ja/resolve/main/parakeet_tdt_ctc_0.6b_ja_5s_i8.tflite"
}