The Critical Rendering Path (CRP) is the sequence of steps browsers follow to convert HTML, CSS, and JavaScript into pixels.
Understanding the CRP is crucial for improving user experience on websites.
Common factors that slow down the CRP include large CSS files, render-blocking JavaScript, web fonts delaying text rendering, layout shifts, and third-party scripts.
Tools like Chrome DevTools, WebPageTest, Load Time Chrome Extension, Lighthouse, Perfume.js, and SpeedVitals can help diagnose and optimize the critical rendering path for faster page rendering.