{
  "url": "https://hamarepo.com/",
  "measurement_type": "isolated_html_copy_comparison",
  "tool": "Lighthouse",
  "tool_version": "13.4.1",
  "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/153.0.0.0 Safari/537.36",
  "measured_at": "2026-09-25T02:55:16.954Z",
  "runs_per_variant": 3,
  "aggregation": "median",
  "order": [
    "before",
    "after",
    "after",
    "before",
    "before",
    "after"
  ],
  "image_assets": 69,
  "image_manifest_sha256": "a6359e50406f1bf888d7674c38cdbb6c493a4eed264b8c50798762d5bf49f8fd",
  "source_sha256": "b4b7fc490d2e1abf1a3b43cdd6087793e3adc4e1b6f4d99232995d34a176e139",
  "after_sha256": "27fb898e19460f6684ee6f74c70a10e6e46b80cf00eb1e9740ec0da12336594f",
  "changes": [
    "最初の画面の4画像を後回しにしない",
    "予備測定で特定した主要画像を優先取得",
    "最初の4画像のフェードイン待ちを解消",
    "28枚の画面外候補画像に標準の遅延読み込みを指定"
  ],
  "settings": {
    "formFactor": "mobile",
    "screenEmulation": {
      "mobile": true,
      "width": 412,
      "height": 823,
      "deviceScaleFactor": 1.75,
      "disabled": false
    },
    "throttling": {
      "rttMs": 150,
      "throughputKbps": 1638.4,
      "requestLatencyMs": 562.5,
      "downloadThroughputKbps": 1474.5600000000002,
      "uploadThroughputKbps": 675,
      "cpuSlowdownMultiplier": 4
    },
    "throttlingMethod": "simulate"
  },
  "before": {
    "score": {
      "median": 52,
      "min": 50,
      "max": 60
    },
    "lcp_ms": {
      "median": 17153.381824999997,
      "min": 17148.057137151434,
      "max": 20177.242809700416
    },
    "cls": {
      "median": 0.1619538206949293,
      "min": 0.1619538206949293,
      "max": 0.16221212129964463
    },
    "tbt_ms": {
      "median": 175.5,
      "min": 120.5,
      "max": 189
    },
    "fcp_ms": {
      "median": 3991.7477499999995,
      "min": 2444.1484093948843,
      "max": 6841.390525379411
    }
  },
  "after": {
    "score": {
      "median": 61,
      "min": 59,
      "max": 66
    },
    "lcp_ms": {
      "median": 8608.877481650612,
      "min": 8328.52368197996,
      "max": 9965.419344400809
    },
    "cls": {
      "median": 0.08427488476402176,
      "min": 0.02382248268387505,
      "max": 0.08427488476402176
    },
    "tbt_ms": {
      "median": 172.5,
      "min": 171,
      "max": 174
    },
    "fcp_ms": {
      "median": 3968.411606905889,
      "min": 2455.6750338567367,
      "max": 3972.727100556386
    }
  },
  "runs": [
    {
      "variant": "before",
      "round": 1,
      "measured_at": "2026-09-25T02:53:49.697Z",
      "score": 50,
      "lcp_ms": 20177.242809700416,
      "cls": 0.1619538206949293,
      "tbt_ms": 120.5,
      "fcp_ms": 6841.390525379411,
      "warnings": [],
      "report": "before-1.lighthouse.json"
    },
    {
      "variant": "after",
      "round": 1,
      "measured_at": "2026-09-25T02:54:08.284Z",
      "score": 61,
      "lcp_ms": 8608.877481650612,
      "cls": 0.02382248268387505,
      "tbt_ms": 174,
      "fcp_ms": 3972.727100556386,
      "warnings": [],
      "report": "after-1.lighthouse.json"
    },
    {
      "variant": "after",
      "round": 2,
      "measured_at": "2026-09-25T02:54:21.519Z",
      "score": 59,
      "lcp_ms": 9965.419344400809,
      "cls": 0.08427488476402176,
      "tbt_ms": 171,
      "fcp_ms": 3968.411606905889,
      "warnings": [],
      "report": "after-2.lighthouse.json"
    },
    {
      "variant": "before",
      "round": 2,
      "measured_at": "2026-09-25T02:54:40.008Z",
      "score": 60,
      "lcp_ms": 17148.057137151434,
      "cls": 0.16221212129964463,
      "tbt_ms": 175.5,
      "fcp_ms": 2444.1484093948843,
      "warnings": [],
      "report": "before-2.lighthouse.json"
    },
    {
      "variant": "before",
      "round": 3,
      "measured_at": "2026-09-25T02:54:58.342Z",
      "score": 52,
      "lcp_ms": 17153.381824999997,
      "cls": 0.1619538206949293,
      "tbt_ms": 189,
      "fcp_ms": 3991.7477499999995,
      "warnings": [],
      "report": "before-3.lighthouse.json"
    },
    {
      "variant": "after",
      "round": 3,
      "measured_at": "2026-09-25T02:55:16.954Z",
      "score": 66,
      "lcp_ms": 8328.52368197996,
      "cls": 0.08427488476402176,
      "tbt_ms": 172.5,
      "fcp_ms": 2455.6750338567367,
      "warnings": [],
      "report": "after-3.lighthouse.json"
    }
  ],
  "limitations": [
    "固定したHTMLと同一の画像ファイルをローカル配信。CSS・JSは公開サイトから取得。",
    "本番のHTML・画像配信の応答時間を含まない。外部CSS・JS・広告によるばらつきがある。",
    "本番サイトへの改善反映は行っていない。利用者全員への改善保証ではない。",
    "2026年9月9日の単発計測とは測定条件が異なり、直接比較できない。"
  ]
}