puppeteer/website/versioned_docs/version-21.5.2/api/puppeteer.metrics.md

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---
sidebar_label: Metrics
---
# Metrics interface
#### Signature:
```typescript
export interface Metrics
```
## Properties
| Property | Modifiers | Type | Description | Default |
| ------------------- | --------------------- | ------ | ----------- | ------- |
| Documents | <code>optional</code> | number | | |
| Frames | <code>optional</code> | number | | |
| JSEventListeners | <code>optional</code> | number | | |
| JSHeapTotalSize | <code>optional</code> | number | | |
| JSHeapUsedSize | <code>optional</code> | number | | |
| LayoutCount | <code>optional</code> | number | | |
| LayoutDuration | <code>optional</code> | number | | |
| Nodes | <code>optional</code> | number | | |
| RecalcStyleCount | <code>optional</code> | number | | |
| RecalcStyleDuration | <code>optional</code> | number | | |
| ScriptDuration | <code>optional</code> | number | | |
| TaskDuration | <code>optional</code> | number | | |
| Timestamp | <code>optional</code> | number | | |