puppeteer-profile v1.0.5

puppeteer-profile

A profiling library for Puppeteer, based on a collection of Puppeteer recipes aggregated by puppeteer-webperf.

Getting Started

Installation

npm i puppeteer-profile

Usage

Attach the puppeteer-profile API to the page object in your test's beforeAll.

const puppeteerProfile = require('puppeteer-profile');

describe('Test', () => {
  beforeAll(async () => {
    // Attach profiling methods to the Puppeteer page object
    page = puppeteerProfile(page);
    await page.goto('http://localhost:8080');

    // Output Chrome page load timings
    await page.timings();

    // Output Chrome heap object count
    await page.profileHeap();
  });
});

API

page.timings()

Prints the Chrome page load timings.

await page.timings()

==== Timings ====
{
  "navigationStart": 1612849857595,
  "unloadEventStart": 0,
  "unloadEventEnd": 0,
  "redirectStart": 0,
  "redirectEnd": 0,
  "fetchStart": 1612849857596,
  "domainLookupStart": 1612849857603,
  "domainLookupEnd": 1612849857603,
  "connectStart": 1612849857603,
  "connectEnd": 1612849857603,
  "secureConnectionStart": 0,
  "requestStart": 1612849857603,
  "responseStart": 1612849857616,
  "responseEnd": 1612849857618,
  "domLoading": 1612849857621,
  "domInteractive": 1612849858034,
  "domContentLoadedEventStart": 1612849858034,
  "domContentLoadedEventEnd": 1612849858601,
  "domComplete": 1612849858830,
  "loadEventStart": 1612849858830,
  "loadEventEnd": 1612849858831
}

page.profileHeap()

Prints the current object count in the browser heap. This can be used at various times throughout your Puppeteer tests

await page.profileHeap()

==== Heap Count ====
Objects: 74332

page.runtimeMetrics()

Prints the Chrome page runtime metrics.

await page.runtimeMetrics()

==== Metrics ====
{
  "Timestamp": 387342.204604,
  "Documents": 5,
  "Frames": 4,
  "JSEventListeners": 894,
  "Nodes": 31967,
  "LayoutCount": 132,
  "RecalcStyleCount": 240,
  "LayoutDuration": 0.121866,
  "RecalcStyleDuration": 0.141439,
  "ScriptDuration": 1.314362,
  "TaskDuration": 2.327362,
  "JSHeapUsedSize": 9894336,
  "JSHeapTotalSize": 15261696
}