Your site measures the speed of its pages with your real visitors. This article explains the measures and their verdicts, then how to read them in the dashboard and in the Web performance tab of your statistics to find the page that slows your site down.
Before you start
- Speed is measured in the browser of your real visitors, on their devices and their connections, on every page they load. You have nothing to install.
- Each number is a P75: three loads out of four were that fast or faster.
- The verdicts Good, Needs improvement and Poor follow the thresholds that Google publishes for its Core Web Vitals.
Understand the measures
| Measure | Definition | Good | Needs improvement | Poor |
|---|---|---|---|---|
| LCP | The time before the largest visible element is displayed, often the main image or heading. | 2.5 s or less | 4 s or less | Beyond |
| INP | How long the page takes to react to a click or a keystroke. | 200 ms or less | 500 ms or less | Beyond |
| CLS | The layout jumps during loading, as a unitless score. | 0.1 or less | 0.25 or less | Beyond |
| FCP | The time before the first display. | 1.8 s or less | 3 s or less | Beyond |
| TTFB | The time before the first byte of the page. | 800 ms or less | 1.8 s or less | Beyond |
LCP, INP and CLS are the three Core Web Vitals. The overall verdict is that of the worst of the three. Two labels describe the state of the measure.
| Note | Meaning |
|---|---|
| Insufficient data | The measure rests on too few loads to be judged. No verdict is shown. |
| Partial | The LCP or the CLS is still missing. The verdict rests on the other measures. |
Read the speed in the dashboard
On the card of each site, in the Lovely Render Dashboard, the Web performance line sums up the last 30 days. It gives the verdict, then the LCP, the INP and the CLS, each in the color of its verdict.
- The verdict of the line needs enough loads measured over the last days. Otherwise, the line shows Insufficient data.
- The label 24 h followed by a verdict gives the last 24 hours, when they hold enough measures.
- The label Stale flags a measure that the site has not renewed for several hours.
Hovering the line opens the detail.
- Each measure, followed by its value over the 30 days before, for example LCP 1.62 s (vs 1.71 s before). Origin is the time your server takes to produce the page.
- The number of page views measured and their share of the total.
- The date of the measure, after Measured.
Read the Web performance tab
- In the Statistics menu of the administration, open the Web performance tab.
- Choose the period at the top of the screen. The filters of the screen apply, for example Screen format or Country.
- Read the three cards Core Web Vitals, Loading and Pages.
Each card gives the P75 of each measure and its Loads, the number of loads measured that the figure rests on. In this tab, a measure has its verdict when enough loads were measured over the period.
Core Web Vitals
The overall verdict shows next to the title. Each line carries its verdict, a bar filled with the share of loads judged good and an arrow showing the change against the previous period. A green arrow pointing down flags a time going down.
Hovering a bar gives the share of good, needs improvement and poor loads.
Loading
The card gives the TTFB and the FCP with their verdict, then the browser stages: DOM interactive, DOMContentLoaded and Loading. The Server response is the time your site takes to produce the page, before the trip over the network. Google publishes no threshold for these last four: they have no verdict.
Pages
The card lists your pages, the most viewed first, with their Views, their LCP, their INP and their CLS. A value takes the color of its verdict when the page has enough loads measured. A page under this threshold is grayed out.
Hovering a line gives its views, its measured loads, the dominant device, the time spent and the scroll. Clicking a page opens its detail, where the Web performance card repeats its measures in two views, Core Web Vitals and Loading.
Find the page that slows your site down
- In the Web performance tab, open Add a filter and choose the value Mobile under Screen format.
- Read the Pages card. Spot the most viewed page whose LCP is Needs improvement or Poor.
- Open this page in the editor and lighten what shows first, most often a header image that is too heavy.
- Publish the site, then follow the change arrow over the next period.
Understand the limits of the measure
- The measure comes from the browser. A script blocker, an old browser or a visitor who objects to audience measurement report nothing. The page view count, for its part, stays complete.
- The measure adds no cookie and no request. It leaves with the signal that measures the time spent.
- Under a Channel or Entry page filter, the change arrows disappear: the previous period does not compare the same visitors.