The three metrics
Largest Contentful Paint (LCP)
Measures how long it takes for the largest visible element (image, video, or text block) to render.| Rating | Threshold |
|---|---|
| Good | ≤ 2.5 seconds |
| Needs improvement | 2.5–4.0 seconds |
| Poor | > 4.0 seconds |
Interaction to Next Paint (INP)
Measures responsiveness — how quickly the page responds to user interactions (clicks, taps, key presses).| Rating | Threshold |
|---|---|
| Good | ≤ 200 milliseconds |
| Needs improvement | 200–500 milliseconds |
| Poor | > 500 milliseconds |
Cumulative Layout Shift (CLS)
Measures visual stability — how much the page layout shifts unexpectedly during loading.| Rating | Threshold |
|---|---|
| Good | ≤ 0.1 |
| Needs improvement | 0.1–0.25 |
| Poor | > 0.25 |
Because data comes from the PageSpeed Insights API, there may be a short delay before results
appear. Browser settings like network throttling, device emulation, and VPN do not affect these
results — the API runs its own independent test. Local browser-based measurements are planned for
the future.
Next steps
Browser settings
Configure network throttling and device emulation.
Redirect tracing
Audit redirect chains that add latency.