1542173 - Anomalies in navigation timing API

Status: UNCONFIRMED

(Core :: DOM: Core & HTML, defect, P3)

Description

[Joan]

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:66.0) Gecko/20100101 Firefox/66.0

Steps to reproduce:

We couldn't reproduce it

Actual results:

From Generali Spain we are working on a new system to get the performance from our commercial agent network. The new performance metric are based on navigation timing API https://www.w3.org/TR/navigation-timing.

Expected results:

We collect around 119K hits/day from Firefox. We found around 490 (0.4%) anomalies distributed in:

• fetchStart goes before navigationStart: 377 hits/day
  {
  "type": "load",
  "sherlockVersion": "1.0.3",
  "timestamp": 1554112510515,
  "jsessionId": "0000r4c-of2LJMoKNbIBlKJXHH-:16d2dcsc0",
  "pageId": "G7703AD5-4D037307-L97C284C",
  "traceId": "",
  "url": "https://www.generali.es/emi_genComunFormWeb/updateDatosBusqueda.do?tarea=ensMotivoAnul&valueParameter=reg1092.ypoliz&focus=reg1092_ypoliz&reg1092.ypoliz=704011848&form=profile&page=1&clientTime=825&clientTime1=380&clientTime2=349&clientTime3=1&clientTime4=95&netTime1=&netTime2=",
  "userAgent": "Mozilla/5.0 (Windows NT 6.1; rv:66.0) Gecko/20100101 Firefox/66.0",
  "navigationStart": 1554112509248,
  "unloadEventStart": 0,
  "unloadEventEnd": 0,
  "redirectStart": 0,
  "redirectEnd": 0,
  "fetchStart": 1554112509233,
  "domainLookupStart": 1554112509233,
  "domainLookupEnd": 1554112509233,
  "connectStart": 1554112509233,
  "connectEnd": 1554112509233,
  "secureConnectionStart": 1554112509233,
  "requestStart": 1554112509342,
  "responseStart": 1554112509451,
  "responseEnd": 1554112509467,
  "domLoading": 1554112509482,
  "domInteractive": 1554112509997,
  "domContentLoadedEventStart": 1554112510106,
  "domContentLoadedEventEnd": 1554112510122,
  "domComplete": 1554112510184,
  "loadEventStart": 1554112510184,
  "loadEventEnd": 1554112510184
  }

• responseStart goes before requestStart: 113 hits/day
  {
  "type": "load",
  "sherlockVersion": "1.0.3",
  "timestamp": 1554115912410,
  "jsessionId": "0000Sl4EJX3Nfyo3arvb28-WO0c:17g2mnn6m",
  "pageId": "4C5F87A4-71D2B121-4C0AD0EB",
  "traceId": "",
  "url": "https://www.generali.es/red_herramientasComFormWeb/maintenanceTableListaActiv.do?tarea=bajarMT&valueParameter=buscaAc.lista.listaAvisosListValue&focus=buscaAc_lista_listaAvisosListValue&buscaAc.lista.listaAvisosListValue=9&form=profile&page=1&clientTime=856&clientTime1=625&clientTime2=211&clientTime3=1&clientTime4=19&netTime1=&netTime2=&column=1",
  "userAgent": "Mozilla/5.0 (Windows NT 5.1; rv:47.0) Gecko/20100101 Firefox/47.0",
  "navigationStart": 1554115908814,
  "unloadEventStart": 1554115910078,
  "unloadEventEnd": 1554115910080,
  "redirectStart": 0,
  "redirectEnd": 0,
  "fetchStart": 1554115908815,
  "domainLookupStart": 1554115908817,
  "domainLookupEnd": 1554115908817,
  "connectStart": 1554115908817,
  "connectEnd": 1554115908871,
  "secureConnectionStart": 0,
  "requestStart": 1554115909861,
  "responseStart": 1554115908981,
  "responseEnd": 1554115910077,
  "domLoading": 1554115910078,
  "domInteractive": 1554115910579,
  "domContentLoadedEventStart": 1554115911261,
  "domContentLoadedEventEnd": 1554115911304,
  "domComplete": 1554115912417,
  "loadEventStart": 1554115912417,
  "loadEventEnd": 1554115912417
  }

Regards,
Joan

Comment 1

[Timea Cernea [:tbabos][inactive]]

Not sure what to ask for here..moving over to a component, if it is not the proper one please assign it to the right one.

Comment 2

[Henri Sivonen (:hsivonen)]

baku, does this look actionable?

Comment 3

[Andrea Marchesini [:baku]]

Moving the NI to valentin.