Web Performance Recipes With Puppeteer

Get a DevTools performance trace for a page load Get a DevTools trace with screenshots Get a DevTools trace and extract filmstrip screenshots Get a DevTools trace for a user interaction Get Runtime performance metrics Generate a Lighthouse report Extract Lighthouse performance metrics Emulate a slow network Emulate a slow network and CPU Test your site renders with JavaScript disabled Get Navigation Timing API metrics Measure First Paint and First Contentful Paint Measure Largest Contentful Paint w/PerformanceObserver Measure Cumulative Layout Shift w/PerformanceObserver Measure SPA metrics with Next.js Get DevTools-specific metrics: Frames Per Second Measure memory leaks Override requests with Request Interception Block third-party domains Code Coverage for JavaScript and CSS