| Resource Type | Budget | Typical Range |
|---|
| Metric | Good | Needs Improvement | Poor |
|---|---|---|---|
| LCP (Largest Contentful Paint) | ≤ 2.5s | 2.5s - 4.0s | > 4.0s |
| INP (Interaction to Next Paint) | ≤ 200ms | 200ms - 500ms | > 500ms |
| CLS (Cumulative Layout Shift) | ≤ 0.1 | 0.1 - 0.25 | > 0.25 |
Measures loading performance. The time it takes for the largest content element (image, video, or text block) to become visible in the viewport.
Measures responsiveness. The latency of all user interactions throughout the page lifecycle, reporting the worst interaction (excluding outliers).
Measures visual stability. The sum of all unexpected layout shifts that occur during the entire lifespan of the page.