{
 "caniuse": [
  "resource-timing"
 ],
 "compat_features": [
  "api.Performance.clearResourceTimings",
  "api.Performance.resourcetimingbufferfull_event",
  "api.Performance.setResourceTimingBufferSize",
  "api.PerformanceResourceTiming",
  "api.PerformanceResourceTiming.connectEnd",
  "api.PerformanceResourceTiming.connectStart",
  "api.PerformanceResourceTiming.contentType",
  "api.PerformanceResourceTiming.deliveryType",
  "api.PerformanceResourceTiming.domainLookupEnd",
  "api.PerformanceResourceTiming.domainLookupStart",
  "api.PerformanceResourceTiming.fetchStart",
  "api.PerformanceResourceTiming.firstInterimResponseStart",
  "api.PerformanceResourceTiming.initiatorType",
  "api.PerformanceResourceTiming.nextHopProtocol",
  "api.PerformanceResourceTiming.redirectEnd",
  "api.PerformanceResourceTiming.redirectStart",
  "api.PerformanceResourceTiming.renderBlockingStatus",
  "api.PerformanceResourceTiming.requestStart",
  "api.PerformanceResourceTiming.responseEnd",
  "api.PerformanceResourceTiming.responseStart",
  "api.PerformanceResourceTiming.responseStatus",
  "api.PerformanceResourceTiming.secureConnectionStart",
  "api.PerformanceResourceTiming.toJSON",
  "api.PerformanceResourceTiming.workerStart",
  "api.PerformanceResourceTiming.worker_support"
 ],
 "description": "PerformanceResourceTiming entries report when network events happen while loading a resource, such as when connections start and end. You can use this information to measure loading times.",
 "description_html": "<code>PerformanceResourceTiming</code> entries report when network events happen while loading a resource, such as when connections start and end. You can use this information to measure loading times.",
 "group": [
  "performance"
 ],
 "kind": "feature",
 "name": "Resource timing",
 "spec": [
  "https://w3c.github.io/resource-timing/"
 ],
 "status": {
  "baseline": "high",
  "baseline_high_date": "2020-03-19",
  "baseline_low_date": "2017-09-19",
  "by_compat_key": {
   "api.Performance.clearResourceTimings": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "46",
     "chrome_android": "46",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.Performance.resourcetimingbufferfull_event": {
    "baseline": "high",
    "baseline_high_date": "2022-07-15",
    "baseline_low_date": "2020-01-15",
    "support": {
     "chrome": "46",
     "chrome_android": "46",
     "edge": "79",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.Performance.setResourceTimingBufferSize": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "46",
     "chrome_android": "46",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "29",
     "chrome_android": "29",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.connectEnd": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.connectStart": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.contentType": {
    "baseline": false,
    "support": {
     "chrome": "148",
     "chrome_android": "148",
     "edge": "148",
     "firefox": "129",
     "firefox_android": "129"
    }
   },
   "api.PerformanceResourceTiming.deliveryType": {
    "baseline": false,
    "support": {
     "chrome": "117",
     "chrome_android": "117",
     "edge": "117",
     "safari": "26.4",
     "safari_ios": "26.4"
    }
   },
   "api.PerformanceResourceTiming.domainLookupEnd": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.domainLookupStart": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.fetchStart": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.firstInterimResponseStart": {
    "baseline": "low",
    "baseline_low_date": "2026-06-16",
    "support": {
     "chrome": "115",
     "chrome_android": "115",
     "edge": "115",
     "firefox": "152",
     "firefox_android": "152",
     "safari": "26.4",
     "safari_ios": "26.4"
    }
   },
   "api.PerformanceResourceTiming.initiatorType": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.nextHopProtocol": {
    "baseline": "high",
    "baseline_high_date": "2020-10-30",
    "baseline_low_date": "2018-04-30",
    "support": {
     "chrome": "61",
     "chrome_android": "61",
     "edge": "17",
     "firefox": "45",
     "firefox_android": "45",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.redirectEnd": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.redirectStart": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.renderBlockingStatus": {
    "baseline": false,
    "support": {
     "chrome": "107",
     "chrome_android": "107",
     "edge": "107"
    }
   },
   "api.PerformanceResourceTiming.requestStart": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.responseEnd": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.responseStart": {
    "baseline": "high",
    "baseline_high_date": "2020-03-19",
    "baseline_low_date": "2017-09-19",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "12",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.responseStatus": {
    "baseline": false,
    "support": {
     "chrome": "109",
     "chrome_android": "109",
     "edge": "109",
     "firefox": "129",
     "firefox_android": "129"
    }
   },
   "api.PerformanceResourceTiming.secureConnectionStart": {
    "baseline": "high",
    "baseline_high_date": "2021-04-02",
    "baseline_low_date": "2018-10-02",
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "18",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.toJSON": {
    "baseline": "high",
    "baseline_high_date": "2020-04-17",
    "baseline_low_date": "2017-10-17",
    "support": {
     "chrome": "45",
     "chrome_android": "45",
     "edge": "16",
     "firefox": "35",
     "firefox_android": "35",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.workerStart": {
    "baseline": "high",
    "baseline_high_date": "2020-07-23",
    "baseline_low_date": "2018-01-23",
    "support": {
     "chrome": "46",
     "chrome_android": "46",
     "edge": "16",
     "firefox": "58",
     "firefox_android": "58",
     "safari": "11",
     "safari_ios": "11"
    }
   },
   "api.PerformanceResourceTiming.worker_support": {
    "baseline": false,
    "support": {
     "chrome": "43",
     "chrome_android": "43",
     "edge": "15",
     "firefox": "60",
     "firefox_android": "60",
     "safari": "12"
    }
   }
  },
  "support": {
   "chrome": "29",
   "chrome_android": "29",
   "edge": "12",
   "firefox": "35",
   "firefox_android": "35",
   "safari": "11",
   "safari_ios": "11"
  }
 },
 "id": "resource-timing",
 "groups": [
  "performance"
 ],
 "specs": [
  {
   "url": "https://w3c.github.io/resource-timing/",
   "seriesComposition": "full",
   "shortname": "resource-timing",
   "series": {
    "shortname": "resource-timing",
    "currentSpecification": "resource-timing",
    "title": "Resource Timing",
    "shortTitle": "Resource Timing",
    "releaseUrl": "https://www.w3.org/TR/resource-timing/",
    "nightlyUrl": "https://w3c.github.io/resource-timing/"
   },
   "organization": "W3C",
   "groups": [
    {
     "name": "Web Performance Working Group",
     "url": "https://www.w3.org/groups/wg/webperf/"
    }
   ],
   "release": {
    "url": "https://www.w3.org/TR/resource-timing/",
    "status": "Candidate Recommendation Draft",
    "filename": "Overview.html"
   },
   "nightly": {
    "url": "https://w3c.github.io/resource-timing/",
    "status": "Editor's Draft",
    "alternateUrls": [],
    "repository": "https://github.com/w3c/resource-timing",
    "sourcePath": "index.bs",
    "filename": "index.html"
   },
   "title": "Resource Timing",
   "source": "w3c",
   "shortTitle": "Resource Timing",
   "categories": [
    "browser"
   ],
   "standing": "good",
   "tests": {
    "repository": "https://github.com/web-platform-tests/wpt",
    "testPaths": [
     "resource-timing"
    ]
   },
   "fragment": null
  }
 ],
 "mdnUrls": [
  {
   "slug": "Web/API/PerformanceResourceTiming/decodedBodySize",
   "title": "PerformanceResourceTiming: decodedBodySize property",
   "anchor": null,
   "url": "https://developer.mozilla.org/docs/Web/API/PerformanceResourceTiming/decodedBodySize"
  },
  {
   "slug": "Web/API/PerformanceResourceTiming/encodedBodySize",
   "title": "PerformanceResourceTiming: encodedBodySize property",
   "anchor": null,
   "url": "https://developer.mozilla.org/docs/Web/API/PerformanceResourceTiming/encodedBodySize"
  },
  {
   "slug": "Web/API/PerformanceResourceTiming/transferSize",
   "title": "PerformanceResourceTiming: transferSize property",
   "anchor": null,
   "url": "https://developer.mozilla.org/docs/Web/API/PerformanceResourceTiming/transferSize"
  }
 ],
 "standardPositions": [
  {
   "vendor": "mozilla",
   "url": "https://github.com/mozilla/standards-positions/issues/1108",
   "position": "positive",
   "concerns": []
  },
  {
   "vendor": "apple",
   "url": "https://github.com/WebKit/standards-positions/issues/424",
   "position": "support",
   "concerns": []
  }
 ],
 "hasNegativeStandardPosition": false,
 "stateOfSurveys": [],
 "chromeUseCounters": {},
 "interop": [],
 "wpt": {
  "url": "https://wpt.fyi/results?q=feature:resource-timing"
 },
 "developerSignals": null,
 "bugs": {
  "chrome": [
   "https://issuetracker.google.com/issues/327941462",
   "https://bugs.chromium.org/p/chromium/issues/detail?id=1402089",
   "https://bugs.chromium.org/p/chromium/issues/detail?id=1358591",
   "https://bugs.chromium.org/p/chromium/issues/detail?id=1366706",
   "https://bugs.chromium.org/p/chromium/issues/detail?id=1337256",
   "https://crbug.com/1184726",
   "https://bugs.chromium.org/p/chromium/issues/detail?id=663175",
   "https://crbug.com/678547",
   "https://code.google.com/p/chromium/issues/detail?id=465640",
   "https://code.google.com/p/chromium/issues/detail?id=515344",
   "http://crbug.com/159544"
  ]
 },
 "useCases": null,
 "baselineLowDateAsObject": "2017-09-19T00:00:00.000Z",
 "baselineHighDateAsObject": "2020-03-19T00:00:00.000Z"
}