veritatisdoloremque/docs-exp/performance.trace.md

Monorepo for the Firebase JavaScript SDK

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[Home](./index.md) &gt; [@firebase/performance](./performance.md) &gt; [trace](./performance.trace.md)

## trace() function

Returns a new PerformanceTrace instance.

<b>Signature:</b>

```typescript
export declare function trace(performance: FirebasePerformance, name: string): PerformanceTrace;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  performance | [FirebasePerformance](./performance.firebaseperformance.md) | The FirebasePerformance instance to use. |
|  name | string | The name of the trace. |

<b>Returns:</b>

[PerformanceTrace](./performance.performancetrace.md)