unsigned long long PerformanceTiming::requestStart() const
{
ResourceLoadTiming* timing = resourceLoadTiming();
if (!timing)
return connectEnd();
ASSERT(timing->sendStart >= 0);
return resourceLoadTimeRelativeToAbsolute(timing->sendStart);
}
unsigned long long PerformanceTiming::responseStart() const
{
DocumentLoader* loader = documentLoader();
if (!loader)
return requestStart();
const ResourceLoadTiming& timing = loader->response().resourceLoadTiming();
ASSERT(timing.responseStart >= 0);
return resourceLoadTimeRelativeToAbsolute(timing.responseStart);
}
unsigned long long PerformanceTiming::secureConnectionStart() const
{
DocumentLoader* loader = documentLoader();
if (!loader)
return 0;
const ResourceLoadTiming& timing = loader->response().resourceLoadTiming();
if (timing.secureConnectionStart < 0)
return 0;
return resourceLoadTimeRelativeToAbsolute(timing.secureConnectionStart);
}
unsigned long long PerformanceTiming::domainLookupEnd() const
{
ResourceLoadTiming* timing = resourceLoadTiming();
if (!timing)
return domainLookupStart();
// This will be -1 when a DNS request is not performed.
// Rather than exposing a special value that indicates no DNS, we "backfill" with domainLookupStart.
int dnsEnd = timing->dnsEnd;
if (dnsEnd < 0)
return domainLookupStart();
return resourceLoadTimeRelativeToAbsolute(dnsEnd);
}
unsigned long long PerformanceTiming::connectEnd() const
{
DocumentLoader* loader = documentLoader();
if (!loader)
return connectStart();
const ResourceLoadTiming& timing = loader->response().resourceLoadTiming();
// connectEnd will be -1 when a network request is not made.
// Rather than exposing a special value that indicates no new connection, we "backfill" with connectStart.
if (timing.connectEnd < 0)
return connectStart();
return resourceLoadTimeRelativeToAbsolute(timing.connectEnd);
}
unsigned long long PerformanceTiming::domainLookupEnd() const
{
DocumentLoader* loader = documentLoader();
if (!loader)
return domainLookupStart();
const ResourceLoadTiming& timing = loader->response().resourceLoadTiming();
// This will be -1 when a DNS request is not performed.
// Rather than exposing a special value that indicates no DNS, we "backfill" with domainLookupStart.
if (timing.domainLookupEnd < 0)
return domainLookupStart();
return resourceLoadTimeRelativeToAbsolute(timing.domainLookupEnd);
}
unsigned long long PerformanceTiming::responseStart() const
{
ResourceLoadTiming* timing = resourceLoadTiming();
if (!timing)
return requestStart();
// FIXME: Response start needs to be the time of the first received byte.
// However, the ResourceLoadTiming API currently only supports the time
// the last header byte was received. For many responses with reasonable
// sized cookies, the HTTP headers fit into a single packet so this time
// is basically equivalent. But for some responses, particularly those with
// headers larger than a single packet, this time will be too late.
ASSERT(timing->receiveHeadersEnd >= 0);
return resourceLoadTimeRelativeToAbsolute(timing->receiveHeadersEnd);
}
unsigned long long PerformanceTiming::secureConnectionStart() const
{
DocumentLoader* loader = documentLoader();
if (!loader)
return 0;
ResourceLoadTiming* timing = loader->response().resourceLoadTiming();
if (!timing)
return 0;
int sslStart = timing->sslStart;
if (sslStart < 0)
return 0;
return resourceLoadTimeRelativeToAbsolute(sslStart);
}
unsigned long long PerformanceTiming::connectStart() const
{
DocumentLoader* loader = documentLoader();
if (!loader)
return domainLookupEnd();
const ResourceLoadTiming& timing = loader->response().resourceLoadTiming();
// connectStart will be -1 when a network request is not made.
// Rather than exposing a special value that indicates no new connection, we "backfill" with domainLookupEnd.
int connectStart = timing.connectStart;
if (connectStart < 0)
return domainLookupEnd();
// ResourceLoadTiming's connect phase includes DNS, however Navigation Timing's
// connect phase should not. So if there is DNS time, trim it from the start.
if (timing.domainLookupEnd >= 0 && timing.domainLookupEnd > connectStart)
connectStart = timing.domainLookupEnd;
return resourceLoadTimeRelativeToAbsolute(connectStart);
}
