{ "lighthouseVersion": "12.6.1", "requestedUrl": "https://news.quayside.example/2026/10/harbour-bridge-reopens", "mainDocumentUrl": "https://news.quayside.example/2026/10/harbour-bridge-reopens", "finalDisplayedUrl": "https://news.quayside.example/2026/10/harbour-bridge-reopens", "finalUrl": "https://news.quayside.example/2026/10/harbour-bridge-reopens", "fetchTime": "2026-10-15T07:30:44.018Z", "gatherMode": "navigation", "runWarnings": [], "userAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/141.0.0.0 Safari/537.36", "environment": { "networkUserAgent": "Mozilla/5.0 (Linux; Android 11; moto g power (2022)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Mobile Safari/537.36 Chrome-Lighthouse", "hostUserAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/141.0.0.0 Safari/537.36", "benchmarkIndex": 1488.0 }, "configSettings": { "output": [ "json" ], "maxWaitForFcp": 30000, "maxWaitForLoad": 45000, "pauseAfterFcpMs": 1000, "pauseAfterLoadMs": 1000, "networkQuietThresholdMs": 1000, "cpuQuietThresholdMs": 1000, "formFactor": "mobile", "throttling": { "rttMs": 150, "throughputKbps": 1638.4, "requestLatencyMs": 562.5, "downloadThroughputKbps": 1474.5600000000002, "uploadThroughputKbps": 675, "cpuSlowdownMultiplier": 4 }, "throttlingMethod": "simulate", "screenEmulation": { "mobile": true, "width": 412, "height": 823, "deviceScaleFactor": 1.75, "disabled": false }, "emulatedUserAgent": "Mozilla/5.0 (Linux; Android 11; moto g power (2022)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Mobile Safari/537.36", "onlyCategories": [ "performance" ], "channel": "cli" }, "categories": { "performance": { "id": "performance", "title": "Performance", "score": 0.78, "auditRefs": [ { "id": "first-contentful-paint", "weight": 10, "group": "metrics", "acronym": "FCP" }, { "id": "largest-contentful-paint", "weight": 25, "group": "metrics", "acronym": "LCP" }, { "id": "total-blocking-time", "weight": 30, "group": "metrics", "acronym": "TBT" }, { "id": "cumulative-layout-shift", "weight": 25, "group": "metrics", "acronym": "CLS" }, { "id": "speed-index", "weight": 10, "group": "metrics", "acronym": "SI" } ] } }, "audits": { "first-contentful-paint": { "id": "first-contentful-paint", "title": "First Contentful Paint", "score": 0.83, "scoreDisplayMode": "numeric", "numericValue": 2050, "numericUnit": "millisecond", "displayValue": "2.1 s" }, "largest-contentful-paint": { "id": "largest-contentful-paint", "title": "Largest Contentful Paint", "score": 0.72, "scoreDisplayMode": "numeric", "numericValue": 3120, "numericUnit": "millisecond", "displayValue": "3.1 s" }, "total-blocking-time": { "id": "total-blocking-time", "title": "Total Blocking Time", "score": 0.95, "scoreDisplayMode": "numeric", "numericValue": 140, "numericUnit": "millisecond", "displayValue": "140 ms" }, "cumulative-layout-shift": { "id": "cumulative-layout-shift", "title": "Cumulative Layout Shift", "score": 0.56, "scoreDisplayMode": "numeric", "numericValue": 0.2204, "numericUnit": "unitless", "displayValue": "0.22" }, "speed-index": { "id": "speed-index", "title": "Speed Index", "score": 0.9, "scoreDisplayMode": "numeric", "numericValue": 3310, "numericUnit": "millisecond", "displayValue": "3.3 s" }, "server-response-time": { "id": "server-response-time", "title": "Reduce initial server response time", "score": 0, "scoreDisplayMode": "metricSavings", "numericValue": 1420, "numericUnit": "millisecond", "displayValue": "Root document took 1,420 ms", "metricSavings": { "FCP": 1320, "LCP": 1320 }, "details": { "type": "opportunity", "headings": [ { "key": "url", "valueType": "url" }, { "key": "responseTime", "valueType": "timespanMs" } ], "items": [ { "url": "https://news.quayside.example/2026/10/harbour-bridge-reopens", "responseTime": 1420 } ], "overallSavingsMs": 1320 } }, "largest-contentful-paint-element": { "id": "largest-contentful-paint-element", "title": "Largest Contentful Paint element", "score": 0, "scoreDisplayMode": "metricSavings", "displayValue": "3,120 ms", "metricSavings": { "LCP": 620 }, "details": { "type": "list", "items": [ { "type": "table", "headings": [ { "key": "node", "valueType": "node", "label": "Element" } ], "items": [ { "node": { "type": "node", "lhId": "1-22-IMG", "path": "1,HTML,1,BODY,2,DIV,0,ARTICLE,1,FIGURE,0,IMG", "selector": "article > figure.article-lead > img.article-lead__image", "nodeLabel": "Traffic crossing the reopened Harbour Bridge at dawn", "snippet": "\"Traffic" } } ] }, { "type": "table", "headings": [ { "key": "phase", "valueType": "text", "label": "Phase" }, { "key": "percent", "valueType": "text", "label": "% of LCP" }, { "key": "timing", "valueType": "ms", "label": "Timing" } ], "items": [ { "phase": "TTFB", "timing": 1650, "percent": "53%" }, { "phase": "Load Delay", "timing": 180, "percent": "6%" }, { "phase": "Load Time", "timing": 820, "percent": "26%" }, { "phase": "Render Delay", "timing": 470, "percent": "15%" } ] } ] } }, "layout-shifts": { "id": "layout-shifts", "title": "Avoid large layout shifts", "score": 0, "scoreDisplayMode": "metricSavings", "metricSavings": { "CLS": 0.22 }, "displayValue": "2 layout shifts found", "details": { "type": "table", "headings": [ { "key": "node", "valueType": "node" }, { "key": "score", "valueType": "numeric" } ], "items": [ { "node": { "type": "node", "lhId": "1-18-DIV", "path": "1,HTML,1,BODY,1,DIV", "selector": "body > div.ad-slot.ad-slot--top", "nodeLabel": "Advertisement", "snippet": "
" }, "score": 0.1503, "subItems": { "type": "subitems", "items": [ { "extra": { "type": "url", "value": "https://ads.adharbor.example/serve/frame.html" }, "cause": "Injected iframe" } ] } }, { "node": { "type": "node", "lhId": "1-22-IMG", "path": "1,HTML,1,BODY,2,DIV,0,ARTICLE,1,FIGURE,0,IMG", "selector": "article > figure.article-lead > img.article-lead__image", "nodeLabel": "Traffic crossing the reopened Harbour Bridge at dawn", "snippet": "\"Traffic" }, "score": 0.0701, "subItems": { "type": "subitems", "items": [ { "extra": { "type": "url", "value": "https://img.quayside.example/2026/10/bridge-1200.webp" }, "cause": "Unsized image element" } ] } } ] } }, "unsized-images": { "id": "unsized-images", "title": "Image elements do not have explicit width and height", "score": 0, "scoreDisplayMode": "metricSavings", "metricSavings": { "CLS": 0 }, "details": { "type": "table", "headings": [ { "key": "node", "valueType": "node" }, { "key": "url", "valueType": "url" } ], "items": [ { "node": { "type": "node", "lhId": "1-22-IMG", "path": "1,HTML,1,BODY,2,DIV,0,ARTICLE,1,FIGURE,0,IMG", "selector": "article > figure.article-lead > img.article-lead__image", "nodeLabel": "Traffic crossing the reopened Harbour Bridge at dawn", "snippet": "\"Traffic" }, "url": "https://img.quayside.example/2026/10/bridge-1200.webp" } ] } }, "unused-css-rules": { "id": "unused-css-rules", "title": "Reduce unused CSS", "score": 0.5, "scoreDisplayMode": "metricSavings", "displayValue": "Est savings of 69 KiB", "metricSavings": { "FCP": 150, "LCP": 150 }, "details": { "type": "opportunity", "headings": [ { "key": "url", "valueType": "url" }, { "key": "totalBytes", "valueType": "bytes" }, { "key": "wastedBytes", "valueType": "bytes" } ], "items": [ { "url": "https://news.quayside.example/assets/site.css", "totalBytes": 92000, "wastedBytes": 71000, "wastedPercent": 77.2 } ], "overallSavingsMs": 150, "overallSavingsBytes": 71000 } }, "long-tasks": { "id": "long-tasks", "title": "Avoid long main-thread tasks", "score": 1, "scoreDisplayMode": "informative", "displayValue": "2 long tasks found", "details": { "type": "table", "headings": [ { "key": "url", "valueType": "url" }, { "key": "startTime", "valueType": "ms" }, { "key": "duration", "valueType": "ms" } ], "items": [ { "url": "https://cdn.adharbor.example/hb/v5/adharbor.js", "duration": 140, "startTime": 2600 }, { "url": "https://news.quayside.example/assets/article.js", "duration": 74, "startTime": 2210 } ] } }, "third-party-summary": { "id": "third-party-summary", "title": "Reduce the impact of third-party code", "score": 1, "scoreDisplayMode": "metricSavings", "metricSavings": { "TBT": 90 }, "details": { "type": "table", "headings": [ { "key": "entity", "valueType": "text" }, { "key": "mainThreadTime", "valueType": "ms" }, { "key": "blockingTime", "valueType": "ms" } ], "items": [ { "entity": "AdHarbor", "mainThreadTime": 380, "blockingTime": 90, "transferSize": 310000 } ] } } }, "entities": [ { "name": "quayside.example", "origins": [ "https://news.quayside.example", "https://img.quayside.example" ], "isFirstParty": true, "isUnrecognized": true }, { "name": "AdHarbor", "origins": [ "https://cdn.adharbor.example", "https://ads.adharbor.example" ], "isFirstParty": false } ] }