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26 #ifndef ResourceLoadTiming_h
27 #define ResourceLoadTiming_h
29 #include "wtf/PassRefPtr.h"
30 #include "wtf/RefCounted.h"
31 #include "wtf/RefPtr.h"
35 class ResourceLoadTiming : public RefCounted<ResourceLoadTiming> {
37 static PassRefPtr<ResourceLoadTiming> create()
39 return adoptRef(new ResourceLoadTiming);
42 PassRefPtr<ResourceLoadTiming> deepCopy()
44 RefPtr<ResourceLoadTiming> timing = create();
45 timing->requestTime = requestTime;
46 timing->proxyStart = proxyStart;
47 timing->proxyEnd = proxyEnd;
48 timing->dnsStart = dnsStart;
49 timing->dnsEnd = dnsEnd;
50 timing->connectStart = connectStart;
51 timing->connectEnd = connectEnd;
52 timing->serviceWorkerFetchStart = serviceWorkerFetchStart;
53 timing->serviceWorkerFetchReady = serviceWorkerFetchReady;
54 timing->serviceWorkerFetchEnd = serviceWorkerFetchEnd;
55 timing->sendStart = sendStart;
56 timing->sendEnd = sendEnd;
57 timing->receiveHeadersEnd = receiveHeadersEnd;
58 timing->sslStart = sslStart;
59 timing->sslEnd = sslEnd;
60 return timing.release();
63 bool operator==(const ResourceLoadTiming& other) const
65 return requestTime == other.requestTime
66 && proxyStart == other.proxyStart
67 && proxyEnd == other.proxyEnd
68 && dnsStart == other.dnsStart
69 && dnsEnd == other.dnsEnd
70 && connectStart == other.connectStart
71 && connectEnd == other.connectEnd
72 && serviceWorkerFetchStart == other.serviceWorkerFetchStart
73 && serviceWorkerFetchReady == other.serviceWorkerFetchReady
74 && serviceWorkerFetchEnd == other.serviceWorkerFetchEnd
75 && sendStart == other.sendStart
76 && sendEnd == other.sendEnd
77 && receiveHeadersEnd == other.receiveHeadersEnd
78 && sslStart == other.sslStart
79 && sslEnd == other.sslEnd;
82 bool operator!=(const ResourceLoadTiming& other) const
84 return !(*this == other);
87 // We want to present a unified timeline to Javascript. Using walltime is problematic, because the clock may skew while resources
88 // load. To prevent that skew, we record a single reference walltime when root document navigation begins. All other times are
89 // recorded using monotonicallyIncreasingTime(). When a time needs to be presented to Javascript, we build a pseudo-walltime
90 // using the following equation (requestTime as example):
91 // pseudo time = document wall reference + (requestTime - document monotonic reference).
92 double requestTime; // All monotonicallyIncreasingTime() in seconds
99 double serviceWorkerFetchStart;
100 double serviceWorkerFetchReady;
101 double serviceWorkerFetchEnd;
104 double receiveHeadersEnd;
108 double calculateMillisecondDelta(double time) const { return time ? (time - requestTime) * 1000 : -1; }
119 , serviceWorkerFetchStart(0)
120 , serviceWorkerFetchReady(0)
121 , serviceWorkerFetchEnd(0)
124 , receiveHeadersEnd(0)