Total Browser Processing Time
Time To First Layout
Layout Rendering Time
CSS Processing Time
CSS Calculations
Javascript Execution Time
Javascript Event Listeners
Layout Rendering Time
Target Less than 0.4 seconds
How long does the browser perform rendering operations until my page loaded and idle?
Layout Rendering Time (LRT) is a measure of the total time the browser spends to render (and re-render) layout elements of a page.
The negative effects of a longer time spent by the browser on layout rendering can be poor Core Web Vitals, like high Cumulative Layout Shift (CLS), longer blocking time, and degraded scroll and click performance — giving pages that 'sticky' feeling.
