TL;DR
The critical rendering path (CRP) is the sequence of steps the browser performs to convert HTML, CSS, and JavaScript into pixels on the screen, including DOM construction, CSSOM construction, render tree assembly, layout, and paint.
What is Critical Rendering Path (CRP)?
The critical rendering path (CRP) is the sequence of steps the browser performs to convert HTML, CSS, and JavaScript into pixels on the screen, including DOM construction, CSSOM construction, render tree assembly, layout, and paint.
Learn more in our how to improve the critical rendering path guide, or work with us through our done-for-you speed optimization service.
How CRP is Measured
The path can be inspected with the Performance panel in Chrome DevTools and the Coverage tool.