C++ (Cpp) ResourceLoadTiming::connectStartの例

コード例 #1

ファイル: PerformanceTiming.cpp プロジェクト: joone/blink-crosswalk

unsigned long long PerformanceTiming::connectStart() const
{
    DocumentLoader* loader = documentLoader();
    if (!loader)
        return domainLookupEnd();

    ResourceLoadTiming* timing = loader->response().resourceLoadTiming();
    if (!timing)
        return domainLookupEnd();

    // connectStart will be zero when a network request is not made.
    // Rather than exposing a special value that indicates no new connection, we "backfill" with domainLookupEnd.
    double connectStart = timing->connectStart();
    if (connectStart == 0.0 || loader->response().connectionReused())
        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->dnsEnd() > 0.0 && timing->dnsEnd() > connectStart)
        connectStart = timing->dnsEnd();

    return monotonicTimeToIntegerMilliseconds(connectStart);
}