# duration

`import { duration } from "destack:telemetry";`

Record a duration sample with the default meter.

```ds title="duration"
export function duration(name: string, value: Duration, fields?: Fields | undefined): void
```

[language/library/src/telemetry/metric.ds:203:205](https://github.com/destack-sh/destack/blob/main/language/library/src/telemetry/metric.ds#L203-L205)