# Performance

### How Does It Work?

This script extension helps you view your Webflow website's performance from the user's perspective by collecting Real User Monitoring (RUM) data.

The metrics noted in the table below, measured in milliseconds, are collected and made accessible through the 'geoflow' object—alongside the other visitor data properties.

<table data-full-width="false"><thead><tr><th width="255">Property Name</th><th width="388">Property Variable</th><th>Type</th></tr></thead><tbody><tr><td>First Paint</td><td><mark style="color:yellow;"><code>Performance_FP</code></mark></td><td>Number</td></tr><tr><td>First Contentful Paint</td><td><mark style="color:yellow;"><code>Performance_FCP</code></mark></td><td>Number</td></tr><tr><td>Largest Contentful Paint</td><td><mark style="color:yellow;"><code>Performance_LCP</code></mark></td><td>Number</td></tr><tr><td>Total Blocking Time</td><td><mark style="color:yellow;"><code>Performance_TBT</code></mark></td><td>Number</td></tr><tr><td>Cumulative Layout Shift</td><td><mark style="color:yellow;"><code>Performance_CLS</code></mark></td><td>Number</td></tr><tr><td>First Input Delay</td><td><mark style="color:yellow;"><code>Performance_FID</code></mark></td><td>Number</td></tr><tr><td>Time to First Byte</td><td><mark style="color:yellow;"><code>Performance_TTFB</code></mark></td><td>Number</td></tr><tr><td>DOM Interactive</td><td><mark style="color:yellow;"><code>Performance_DOM</code></mark></td><td>Number</td></tr><tr><td>Total Load Time</td><td><mark style="color:yellow;"><code>Performance_TLT</code></mark></td><td>Number</td></tr></tbody></table>

### How To Implement

| Attribute Name  | Attribute Value | Which Page Element?       |
| --------------- | --------------- | ------------------------- |
| data-extensions | performance     | \<script> Tag for Geoflow |

### Example

```html
<script data-extensions="performance" src="https://cdn.getgeoflow.com/beta/script.min.js" crossorigin="anonymous" fetchpriority="auto"></script>
```


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developers.getgeoflow.com/geoflow-docs/feature/script-extensions/performance.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.