1 | 'use strict';
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2 |
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3 |
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4 | const ChromeTrace = require('chrome-trace-event').Tracer;
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5 |
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6 | class Trace {
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7 | constructor() {
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8 | this.chromeTrace = new ChromeTrace({
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9 |
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10 | });
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11 |
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12 | this.tid = 0;
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13 | this.eventId = 0;
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14 |
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15 | this.init();
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16 | }
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17 |
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18 | getEventId() {
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19 | const id = this.eventId;
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20 | this.eventId++;
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21 | return id;
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22 | }
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23 |
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24 | init() {
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25 | this.chromeTrace.instantEvent({
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26 | name: 'TracingStartedInPage',
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27 | id: this.getEventId(),
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28 | cat: ['disabled-by-default-devtools.timeline'],
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29 | args: {
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30 | data: {
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31 | sessionId: '-1',
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32 | page: '0xfff',
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33 | frames: [{
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34 | frame: '0xfff',
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35 | url: 'parcel',
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36 | name: ''
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37 | }]
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38 | }
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39 | }
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40 | });
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41 |
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42 | this.chromeTrace.instantEvent({
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43 | name: 'TracingStartedInBrowser',
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44 | id: this.getEventId(),
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45 | cat: ['disabled-by-default-devtools.timeline'],
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46 | args: {
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47 | data: {
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48 | sessionId: '-1'
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49 | }
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50 | }
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51 | });
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52 | }
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53 |
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54 | addCPUProfile(name, profile) {
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55 | const trace = this.chromeTrace;
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56 | const tid = this.tid;
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57 | this.tid++;
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58 |
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59 | const cpuStartTime = profile.startTime;
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60 | const cpuEndTime = profile.endTime;
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61 |
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62 | const common = {
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63 | pid: 8763,
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64 | tid
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65 | };
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66 |
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67 | trace.instantEvent(Object.assign({}, common, {
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68 | id: this.getEventId(),
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69 | ph: 'X',
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70 | cat: ['toplevel'],
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71 | name: 'TaskQueueManager::ProcessTaskFromWorkQueue',
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72 | args: {
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73 | src_file: '../../third_party/WebKit/Source/core/workers/DedicatedWorkerObjectProxy.cpp',
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74 | src_func: 'PostMessageToWorkerObject'
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75 | },
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76 | ts: cpuStartTime,
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77 | dur: cpuEndTime - cpuStartTime
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78 | }));
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79 |
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80 | trace.completeEvent(Object.assign({}, common, {
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81 | name: 'EvaluateScript',
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82 | id: this.getEventId(),
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83 | cat: ['devtools.timeline'],
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84 | ts: cpuStartTime,
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85 | dur: cpuEndTime - cpuStartTime,
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86 | args: {
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87 | data: {
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88 | url: 'parcel',
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89 | lineNumber: 1,
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90 | columnNumber: 1,
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91 | frame: '0xFFF'
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92 | }
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93 | }
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94 | }));
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95 |
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96 | trace.instantEvent(Object.assign({}, common, {
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97 | ts: 0,
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98 | ph: 'M',
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99 | cat: ['__metadata'],
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100 | name: 'thread_name',
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101 | args: { name }
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102 | }));
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103 |
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104 | trace.instantEvent(Object.assign({}, common, {
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105 | name: 'CpuProfile',
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106 | id: this.getEventId(),
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107 | cat: ['disabled-by-default-devtools.timeline'],
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108 | ts: cpuEndTime,
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109 | args: {
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110 | data: {
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111 | cpuProfile: profile
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112 | }
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113 | }
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114 | }));
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115 | }
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116 |
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117 | build() {
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118 | return this.chromeTrace.events;
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119 | }
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120 | }
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121 |
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122 | module.exports = Trace; |
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