> ## 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.

# Performance Evaluator • Rust AI Agent SDK

> PerformanceEvaluator: Evaluator for performance metrics.

# PerformanceEvaluator

> Defined in the [**eval**](../modules/eval) module.

<Badge color="orange">Rust AI Agent SDK</Badge>

Evaluator for performance metrics.

## Fields

| Name           | Type                     | Description              |
| -------------- | ------------------------ | ------------------------ |
| `max_duration` | `Duration`               | Maximum allowed duration |
| `max_ttft`     | `Option&lt;Duration&gt;` | Maximum allowed TTFT     |
| `config`       | `EvaluatorConfig`        | Configuration            |

## Methods

### `new`

```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn new() -> PerformanceEvaluatorBuilder
```

Create a new builder.

### `evaluate`

```rust theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}}
fn evaluate(&self, metrics: &PerformanceMetrics) -> PerformanceResult
```

Evaluate performance metrics.

**Parameters:**

| Name      | Type                  |
| --------- | --------------------- |
| `metrics` | `&PerformanceMetrics` |

## Source

<Card title="View on GitHub" icon="github" href="https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-rust/praisonai/src/eval/mod.rs#L432">
  `praisonai/src/eval/mod.rs` at line 432
</Card>

***

## Related Documentation

<CardGroup cols={2}>
  <Card title="Rust Evaluation" icon="gavel" href="/docs/rust/evaluation" />

  <Card title="Rust Criteria" icon="check-double" href="/docs/rust/criteria" />
</CardGroup>