1 /* 2 * Copyright (C) 2010 Google, Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef ResourceLoadTiming_h 27 #define ResourceLoadTiming_h 28 29 #include "wtf/PassRefPtr.h" 30 #include "wtf/RefCounted.h" 31 #include "wtf/RefPtr.h" 32 33 namespace blink { 34 35 class ResourceLoadTiming : public RefCounted<ResourceLoadTiming> { 36 public: create()37 static PassRefPtr<ResourceLoadTiming> create() 38 { 39 return adoptRef(new ResourceLoadTiming); 40 } 41 deepCopy()42 PassRefPtr<ResourceLoadTiming> deepCopy() 43 { 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(); 61 } 62 63 bool operator==(const ResourceLoadTiming& other) const 64 { 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; 80 } 81 82 bool operator!=(const ResourceLoadTiming& other) const 83 { 84 return !(*this == other); 85 } 86 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 93 double proxyStart; 94 double proxyEnd; 95 double dnsStart; 96 double dnsEnd; 97 double connectStart; 98 double connectEnd; 99 double serviceWorkerFetchStart; 100 double serviceWorkerFetchReady; 101 double serviceWorkerFetchEnd; 102 double sendStart; 103 double sendEnd; 104 double receiveHeadersEnd; 105 double sslStart; 106 double sslEnd; 107 calculateMillisecondDelta(double time)108 double calculateMillisecondDelta(double time) const { return time ? (time - requestTime) * 1000 : -1; } 109 110 private: ResourceLoadTiming()111 ResourceLoadTiming() 112 : requestTime(0) 113 , proxyStart(0) 114 , proxyEnd(0) 115 , dnsStart(0) 116 , dnsEnd(0) 117 , connectStart(0) 118 , connectEnd(0) 119 , serviceWorkerFetchStart(0) 120 , serviceWorkerFetchReady(0) 121 , serviceWorkerFetchEnd(0) 122 , sendStart(0) 123 , sendEnd(0) 124 , receiveHeadersEnd(0) 125 , sslStart(0) 126 , sslEnd(0) 127 { 128 } 129 }; 130 131 } 132 133 #endif 134