{
  "date": "2026-10-25",
  "status": "six actual CPU-library outputs; local candidate",
  "runtime": "ComfyUI同梱環境のライブラリを直接CPU実行。ノード操作・ComfyUI実行成功・ComfyUIの速度測定ではない。",
  "versions": {
    "torch": "2.11.0+cu130",
    "spandrel": "0.4.2",
    "Pillow": "12.3.0"
  },
  "device": "CPU float32; torch threads4/interop1; CUDA_VISIBLE_DEVICES empty; cudaInitialized false in every worker",
  "concurrentLoad": {
    "initialCPUPercent": 46.0,
    "initialAvailableRAMBytes": 26311090176,
    "externalGPUWorkload": "Normal app left untouched; no model VRAM/GPU time attribution"
  },
  "inputSize": [
    512,
    512
  ],
  "finalSize": [
    1024,
    1024
  ],
  "methods": {
    "lanczos": "Pillow LANCZOS2x",
    "realesrgan": "same existing anime6B weights, native4x→RGBuint8 round→Pillow LANCZOS downsample1024"
  },
  "model": {
    "filename": "RealESRGAN_x4plus_anime_6B.pth",
    "sha256": "f872d837d3c90ed2e05227bed711af5671a6fd1c9f7d7e91c911a61f155e99da",
    "scale": 4,
    "downloaded": false
  },
  "rights": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/rights-and-inputs.json",
  "outputs": [
    {
      "subject": "lineart",
      "method": "lanczos",
      "input": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/inputs/lineart-512.png",
      "inputSHA256": "1096564c9399baa3f164ac57b79004175db6d9801602db89f5a2694655894e7b",
      "original": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/originals/lineart-lanczos-1024.png",
      "originalSHA256": "753ca51029b245f73284c2839be5b1308f4711fb57016be44d327c1236b9cd16",
      "display": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/lineart-lanczos-1024.webp",
      "displaySHA256": "422b0200e94e0f0e81949e9b6b0ff09376fc72e91636bb75f20dfaa7ae96adf6",
      "width": 1024,
      "height": 1024,
      "recipe": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/recipes/lineart-lanczos.json",
      "processingSecondsIncludingModelLoadAndNativeSave": 0.01136890000088897,
      "cpuModelRAMBytes": null,
      "cudaInitialized": false
    },
    {
      "subject": "lineart",
      "method": "realesrgan",
      "input": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/inputs/lineart-512.png",
      "inputSHA256": "1096564c9399baa3f164ac57b79004175db6d9801602db89f5a2694655894e7b",
      "original": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/originals/lineart-realesrgan-1024.png",
      "originalSHA256": "859de186ceb949705477cfdb6df2f2d8f35d4ad470581f15fc0dc8ecdc375b20",
      "display": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/lineart-realesrgan-1024.webp",
      "displaySHA256": "07d29d0285d83782cafbbc8a20072acd860d2911228e9ea85f26b2d113eebef2",
      "width": 1024,
      "height": 1024,
      "recipe": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/recipes/lineart-realesrgan.json",
      "processingSecondsIncludingModelLoadAndNativeSave": 10.43484609999905,
      "cpuModelRAMBytes": null,
      "cudaInitialized": false
    },
    {
      "subject": "photo",
      "method": "lanczos",
      "input": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/inputs/photo-512.png",
      "inputSHA256": "902d0b37e1e9584c6f0e8a3eccdd41996fc46008fd661c35a951219c8514c108",
      "original": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/originals/photo-lanczos-1024.png",
      "originalSHA256": "39d4d4b65438b6507f2c96c54b1955b4edc4f9727cb819fff441e720c5b5fa5e",
      "display": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/photo-lanczos-1024.webp",
      "displaySHA256": "b84dc6e56881fc2c9a91d076bccc16836ff5a8dd1d25255aae848c6b08724663",
      "width": 1024,
      "height": 1024,
      "recipe": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/recipes/photo-lanczos.json",
      "processingSecondsIncludingModelLoadAndNativeSave": 0.010259700000460725,
      "cpuModelRAMBytes": null,
      "cudaInitialized": false
    },
    {
      "subject": "photo",
      "method": "realesrgan",
      "input": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/inputs/photo-512.png",
      "inputSHA256": "902d0b37e1e9584c6f0e8a3eccdd41996fc46008fd661c35a951219c8514c108",
      "original": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/originals/photo-realesrgan-1024.png",
      "originalSHA256": "c3779bafe54efa551bcd9972ad71c4efe6918f800bb905443a16c073174c1fcd",
      "display": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/photo-realesrgan-1024.webp",
      "displaySHA256": "3eb6aa4f42765dd0ad207d18f79fdb2c1d4faad73015eba53047d92d7fffcd59",
      "width": 1024,
      "height": 1024,
      "recipe": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/recipes/photo-realesrgan.json",
      "processingSecondsIncludingModelLoadAndNativeSave": 9.233531400001084,
      "cpuModelRAMBytes": null,
      "cudaInitialized": false
    },
    {
      "subject": "face",
      "method": "lanczos",
      "input": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/inputs/face-512.png",
      "inputSHA256": "6c51511b2d1880fd12640ce0cb1fe303a5134d8d32472a83a475c536eec4e36b",
      "original": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/originals/face-lanczos-1024.png",
      "originalSHA256": "4c0496c8035774b8d299edcffc995c3fe18c6cfdbe779633a77801e94a92fe09",
      "display": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/face-lanczos-1024.webp",
      "displaySHA256": "0ea73af9dca6e60e2a9130cf45a9e2d95d0e6ad8db6a69142905eaabf0d9f717",
      "width": 1024,
      "height": 1024,
      "recipe": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/recipes/face-lanczos.json",
      "processingSecondsIncludingModelLoadAndNativeSave": 0.009087899999940419,
      "cpuModelRAMBytes": null,
      "cudaInitialized": false
    },
    {
      "subject": "face",
      "method": "realesrgan",
      "input": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/inputs/face-512.png",
      "inputSHA256": "6c51511b2d1880fd12640ce0cb1fe303a5134d8d32472a83a475c536eec4e36b",
      "original": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/originals/face-realesrgan-1024.png",
      "originalSHA256": "bf6fa3bba203443be5045d28d699abab62d7dda42aac810f927c651cefbb896c",
      "display": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/face-realesrgan-1024.webp",
      "displaySHA256": "857c298b9661614d100e3b1a0f2081093fc7608ffff3afaef57ab89705ee2302",
      "width": 1024,
      "height": 1024,
      "recipe": "/images/articles/comfyui-upscale-model-choose/real-cpu-20261025/recipes/face-realesrgan.json",
      "processingSecondsIncludingModelLoadAndNativeSave": 9.061149200000727,
      "cpuModelRAMBytes": null,
      "cudaInitialized": false
    }
  ],
  "ownWorkerStopped": true,
  "ownServerStopped": true,
  "observations": {
    "lineart": "Both retain TEST01. RealESRGAN makes lines more sharply defined.",
    "photo": "RealESRGAN strongly smooths skin/grain and background; portrait looks illustrated. Lanczos preserves more visible grain.",
    "face": "RealESRGAN smooths fine skin texture, hair and mouth-edge rendering differ; not faithful recovered photographic detail."
  },
  "limits": [
    "One trial per input/method, no repeated speed ranking.",
    "Photo and face are crops of the same NASA photograph.",
    "No pixel-equivalence claim to ComfyUI ImageScale, tiled inference, GPU or historical outputs.",
    "Initial RSS samples measured launcher shim; model RAM not captured.",
    "ComfyUI CPU startup failed before prompt submission; those logs retained, no runtime patch/install.",
    "No latent/SDXL generation in this factual-photo fidelity comparison."
  ]
}