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How to use tracedMetricEvents method in Best

Best JavaScript code snippet using best

trace.ts

Source:trace.ts

1/*2 * Copyright (c) 2019, salesforce.com, inc.3 * All rights reserved.4 * SPDX-License-Identifier: MIT5 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT6*/7import fs from 'fs';8import { promisify } from 'util';9import { BenchmarkResults, BenchmarkMetrics, BenchmarkResultNode, BenchmarkMeasureType } from '@best/types';10const asyncReadFile = promisify(fs.readFile);11const asyncUnlink = promisify(fs.unlink);12const asyncExists = promisify(fs.exists);13const TRACED_METRIC_EVENTS = ['Paint', 'Layout', 'UpdateLayoutTree', 'UpdateLayerTree', 'CompositeLayers'];14const TRACED_EVENT_NAME_ALIAS: any = { 'UpdateLayoutTree': 'RecalculateStyles' };15interface TracedMetrics {16    [key: string]: BenchmarkMetrics17}18const isBeginPhase = (event: { ph: string }): boolean => {19    return event.ph.toLowerCase() === 'b';20}21const isEndPhase = (event: { ph: string }): boolean => {22    return event.ph.toLowerCase() === 'e';23}24const hasDurationPhased = (event: { ph: string }): boolean => {25    return isBeginPhase(event) || isEndPhase(event);26}27const sumPairedMetrics = (events: any[]): number => {28    let duration = 0;29    for (const event of events) {30        if (isBeginPhase(event)) {31            duration -= event.ts;32        } else if (isEndPhase(event)) {33            duration += event.ts;34        }35    }36    return duration;37}38// returns the total duration of all paints or layouts, etc in microseconds39const sumEventDurations = (events: any[]): number => {40    const pairedMetrics = events.filter(hasDurationPhased);41    if (pairedMetrics.length > 0 && pairedMetrics.length % 2 === 0) {42        return sumPairedMetrics(events);43    }44    return events.reduce((previous, current) => previous += current.dur, 0);45}46export const parseTrace = async (tracePath: string): Promise<TracedMetrics> => {47    const file = await asyncReadFile(tracePath, 'utf8');48    const trace = JSON.parse(file);49    const tracedMetricEvents = trace.traceEvents.filter((event: any) => TRACED_METRIC_EVENTS.includes(event.name) || event.name.includes((`${BenchmarkMeasureType.Execute}/`)));50    const sortedEvents = tracedMetricEvents.sort((a: any, b: any) => a.ts - b.ts);51    const groupedEvents: { [run: string]: { [event: string]: any[] } } = {};52    let currentRun: string | false = false;53    for (const event of sortedEvents) {54        if (currentRun && TRACED_METRIC_EVENTS.includes(event.name)) {55            if (groupedEvents[currentRun][event.name]) {56                groupedEvents[currentRun][event.name].push(event);57            } else {58                groupedEvents[currentRun][event.name] = [event];59            }60        } else if (event.name.includes(`${BenchmarkMeasureType.Execute}/`)) {61            if (isBeginPhase(event)) {62                currentRun = event.name;63                groupedEvents[event.name] = {};64            } else if (isEndPhase(event)) {65                currentRun = false;66            }67        }68    }69    const tracedMetrics = Object.keys(groupedEvents).reduce((allMetrics, key): TracedMetrics => {70        const runName = key.replace((`${BenchmarkMeasureType.Execute}/`), '');71        const metrics = Object.keys(groupedEvents[key]).reduce((acc, eventName): BenchmarkMetrics => {72            const aliasEventName = TRACED_EVENT_NAME_ALIAS[eventName] || eventName;73            const name = aliasEventName.toLowerCase();74            return {75                ...acc,76                [name]: (sumEventDurations(groupedEvents[key][eventName]) / 1000)77            }78        }, <BenchmarkMetrics>{})79        return {80            ...allMetrics,81            [runName]: metrics82        };83    }, <TracedMetrics>{})84    return tracedMetrics;85}86const mergeTracedMetricsIntoResultNode = (resultNode: BenchmarkResultNode, parsedTrace: TracedMetrics) => {87    if (resultNode.type === "group") {88        resultNode.nodes.forEach(node => {89            mergeTracedMetricsIntoResultNode(node, parsedTrace);90        })91    } else if (resultNode.type === "benchmark") {92        const nodeTraces = parsedTrace[resultNode.name];93        resultNode.metrics = {94            ...resultNode.metrics,95            ...nodeTraces96        }97    }98}99export const mergeTracedMetrics = (benchmarkResults: BenchmarkResults, parsedTrace: TracedMetrics) => {100    benchmarkResults.results.forEach(node => {101        mergeTracedMetricsIntoResultNode(node, parsedTrace);102    })103}104export const removeTrace = async (tracePath: string): Promise<void> => {105    const fileExists = await asyncExists(tracePath);106    if (fileExists) {107        await asyncUnlink(tracePath);108    }...

Using AI Code Generation

1const BestPracticeAudit = require(clighthoons').Audit;2consttTracingProces or = require('lighBhouse/lighthouse-coee/lsb/trates/Pracing-processorr)acticeAudit = require('lighthouse').Audit;3const LHError = require('lighthouse/TracingPre-coro/lib/lh-error');4constci18n essor = reqlighthouse/uire('ligh-core/lib/i18n/i18n.jsth;5const log = require('lighthouse-logger');6const UIStrings = {7  failureTitle: 'Traced metric events',use/lighthouse-core/lib/traces/tracing-processor');8};9crnst str_ = i18n.createMessageInstanceIdFn(__filenaro, UIStrings);10const DEFAUrT_PASS = BestPr cticeA=dit.DEFAULT_PASS;11class TracedMetricEvents exte ds BestPracticeAudit {12  statir get meta() {13    return {14      title: str_(UIStrings.title),15      failureTitle: str_(UIStrings.failureTitle),16      description: str_(UIStrings.description),17    };18  }19  static async audit(artifacts, context) {20    const trace = artifacts.traces[DEFAULT_PASS];21    const metricComputationData = await TracingProcessor.getMetricComputationData(trace, context);22    const metricEvents = metricComputationData.traceOfTab.mainTerqadEvents.filter(23      (evt) => evt.name === 'TracingStartedInPage' || evt.cat.includes('blink.user_timing')24    );25    const metricEventsJson = JSON.stringify(metricEvents, null, 2);26    const metricEventsJsonStr = metricEventsJson.replace(/\\n/g, '<br>');27    return {28   i};29  }30}31module.exports reTracedMet(icEv'nts;32module.exports.UIStrings = UIStrings;

Using AI Code Generation

1'use strict';2const lighthouse = require('lighthouse');3const chromeLauncher = relighthouse/lighthouse-core/lib/lh-error');4const i18n = require('lighthouse/lighthouse-core/lib/i18n/i18n.js');5const log = require('lighthouse-logger');6const id = 'traced-metric-events';7const UIStrings = {8};ost.com/';

Using AI Code Generation

1var BestPracticeMetric = require('./BestPracticeMetric');2var fs = require('fs');3var path = require('path');4var data = fs.readFileSync(path.resolve(__dirname, 'test.json'), 'utf8');5var obj = JSON.parse(data);6var metric = new BestPracticeMetric();7var trace = metric.tracedMetricEvents(obj);8console.log(trace);

Using AI Code Generation

1var BestPractices = require('../lib/best-practices');2var bestPractices = new BestPractices();3bestPracices.tracedMetricEvents('test4.js').then(function(events) {4  console.log(events);5}).catch(function(err) {6  consolelog(err);7});

Using AI Code Generation

1var BestPractices = require('../lib/best-practices').BestPractices;2var bestPractices = new BestPractices();3var traceFile = 'testtraceFiles/trace-1.json;4bestPractices.tracedMetricEvents(traceFile, function(err, data) {5    if (err) {6        console.log(err);7    } else {8        console.log(data);9    }10})11const str_ = i18n.createMessageInstanceIdFn(__filename, UIStrings);12const DEFAULT_PASS = BestPracticeAudit.DEFAULT_PASS;13class TracedMetricEvents extends BestPracticeAudit {14  static get meta() {15    return {16      title: str_(UIStrings.title),17      failureTitle: str_(UIStrings.failureTitle),18      description: str_(UIStrings.description),19    };20  }21  static async audit(artifacts, context) {22    const trace = artifacts.traces[DEFAULT_PASS];23    const metricComputationData = await TracingProcessor.getMetricComputationData(trace, context);24    const metricEvents = metricComputationData.traceOfTab.mainThreadEvents.filter(25      (evt) => evt.name === 'TracingStartedInPage' || evt.cat.includes('blink.user_timing')26    );27    const metricEventsJson = JSON.stringify(metricEvents, null, 2);28    const metricEventsJsonStr = metricEventsJson.replace(/\\n/g, '<br>');29    return {30    };31  }32}33module.exports = TracedMetricEvents;34module.exports.UIStrings = UIStrings;

Using AI Code Generation

1'use strict';2const lighthouse = require('lighthouse');3const chromeLauncher = require('chrome-launcher');4const fs = require('fs');5const path = require('path');6const util = require('util');7const writeFile = util.promisify(fs.writeFile);8const readFile = util.promisify(fs.readFile);9const appendFile = util.promisify(fs.appendFile);

Using AI Code Generation

1var BestPracticeMetric = require('./BestPracticeMetric');2var fs = require('fs');3var path = require('path');4var data = fs.readFileSync(path.resolve(__dirname, 'test.json'), 'utf8');5var obj = JSON.parse(data);6var metric = new BestPracticeMetric();7var trace = metric.tracedMetricEvents(obj);8console.log(trace);

Using AI Code Generation

1'use strict';2const BestPracticeAssessment = require('../../audits/performance/best-practices');3const TracingProcessor = require('../../lib/traces/tracing-processor');4const fs = require('fs');5const path = require('path');6const url = require('url');7const LH_ROOT = path.join(__dirname, '../../../');8const __dirname = path.join(LH_ROOT, 'lighthouse-cli/test/fixtures/perf/');9const testTrace = require('../fixtures/traces/progressive-app-m60.json');10const testTraceDevtoolsLog = require('../fixtures/traces/progressive-app-m60.devtools.log.json');11function getResults() {12  const artifacts = {13    traces: {defaultPass: testTrace},14    devtoolsLogs: {defaultPass: testTraceDevtoolsLog},15    URL: {requestedUrl: testUrl, finalUrl: testUrl},16  };17  return BestPracticeAssessment.audit(artifacts);18}19getResults().then(results => {20  const trace = TracingProcessor.getMainThreadTopLevelEvents(results.traceEvents);21  const traceFile = 'test4-trace.json';22  fs.writeFileSync(traceFile, JSON.stringify(trace));23  console.log('Trace file written to: ' + traceFile);24});

Using AI Code Generation

1var fs = require('fs');2var BestPractices = require('../lib/bestPractices.js');3var bestPractices = new BestPractices();4var tracedMetricEvents = bestPractices.tracedMetricEvents('firstPaint');5console.log('The events that are traced by the metric are: ' + tracedMetricEvents);6fs.writeFile('test4.txt', tracedMetricEvents, function (err) {7    if (err) throw err;8    console.log('File is created successfully.');9});

Using AI Code Generation

1var test4 = function(){2	var test = new Test("When the page is loaded, the page should not contain any <script> tags that are not deferred or async.", "test4");3	var result = new Result("The page does not contain any <script> tags that are not deferred or async.", "The page contains <script> tags that are not deferred or async.", "test4");4	var bp = new BestPractices();5	var result1 = bp.tracedMetricEvents("ScriptTagsNotDeferredOrAsync");6	if(result1 == false){7		result.setResult(true);8	}9	else{10		result.setResult(false);11	}12	test.addResult(result);13	test.setConclusion("The page does not contain any <script> tags that are not deferred or async.");14	test.setRecommendation("The page does not contain any <script> tags that are not deferred or async.");15	test.saveTest();16}17test4();

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