> ## Documentation Index
> Fetch the complete documentation index at: https://praison.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Duration Ms • Rust AI Agent SDK

> duration_ms: Set duration.

# duration\_ms

<div className="flex items-center gap-2">
  <Badge color="purple">Method</Badge>
</div>

> This is a method of the [**ContextEvent**](../classes/ContextEvent) class in the [**trace**](../modules/trace) module.

Set duration.

## Signature

```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
def duration_ms(mut self, ms: u64) -> Self
```

## Parameters

<ParamField query="ms" type="u64" required={true}>
  No description available.
</ParamField>

### Returns

<ResponseField name="Returns" type="Self">
  The result of the operation.
</ResponseField>