Every deployed Rocket project includes a built-in site performance dashboard. Open the Performance tab to see your Core Web Vitals scores, an overall grade, and how your site performs on both mobile and desktop.Google uses these scores to rank your site in search results.
The Performance tab is only available for landing page and website projects.
What the dashboard measures
The Performance tab gives you an overall grade (A through F) based on five Core Web Vitals metrics. Each metric shows a score, a progress bar, and a rating (Great, Needs Improvement, or Poor).Page Load Speed (LCP)
Largest Contentful Paint measures how long it takes for the largest visible element (hero image, heading, etc.) to fully render.| Rating | Threshold |
|---|---|
| Great | Under 2.5 seconds |
| Needs Improvement | 2.5 to 4 seconds |
| Poor | Over 4 seconds |
Click Response (INP)
Interaction to Next Paint measures how quickly your site responds when a user clicks, taps, or types.| Rating | Threshold |
|---|---|
| Great | Under 200ms |
| Needs Improvement | 200ms to 500ms |
| Poor | Over 500ms |
Page Stability (CLS)
Cumulative Layout Shift measures how much the page layout moves around while loading. A score of 0 means nothing shifts.| Rating | Threshold |
|---|---|
| Great | Under 0.1 |
| Needs Improvement | 0.1 to 0.25 |
| Poor | Over 0.25 |
First Impression (FCP)
First Contentful Paint measures how quickly the first piece of content (text, image, or background) appears on screen.| Rating | Threshold |
|---|---|
| Great | Under 1.8 seconds |
| Needs Improvement | 1.8 to 3 seconds |
| Poor | Over 3 seconds |
Server Speed (TTFB)
Time to First Byte measures how quickly the server starts sending data back to the browser.| Rating | Threshold |
|---|---|
| Great | Under 800ms |
| Needs Improvement | 800ms to 1800ms |
| Poor | Over 1800ms |
How to access it
- Open your project in Rocket.
- Click the Performance tab in the top navigation bar.
- Switch between Mobile and Desktop tabs to see scores for each.
- Click Refresh to re-run the performance check.
Performance scores are measured on your deployed site. You need to deploy your project before scores are available.
Identified issues
Below the metric cards, the Performance tab lists specific issues detected on your site. Each issue includes the affected metric, the current value, and an estimated savings breakdown so you can see exactly where time or bytes are being lost. Common issues include:- High LCP or FCP caused by unused JavaScript, render-blocking CSS, or unoptimized images.
- Unoptimized image delivery with estimated waste in KiB for mobile and desktop.
- Missing cache headers on generated images, affecting both LCP and FCP savings.
Fixing or ignoring issues
Every issue has two actions:- Try to fix: Click this button and Rocket applies an automatic fix to your project. This may include compressing images, removing unused code, adding lazy loading, or setting cache headers.
- Ignore: Dismisses the issue if it is not relevant or if you plan to address it manually.
Improving your scores
If you prefer to guide fixes yourself, you can also ask Rocket in chat. Try these prompts:What’s next?
Improve SEO
Performance scores directly affect your Google search rankings.
Site analytics
Track how performance improvements affect traffic and engagement.
Improve accessibility
Accessible sites tend to perform better due to cleaner HTML structure.
Deploy to web
Deploy your project so performance scores can be measured.