https://addyosmani.com/blog/puppeteer-recipes/

Table Of Contents

• Get a DevTools performance trace for a page load
• Get a DevTools trace with 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