[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Time](https://evolu.dev/docs/api-reference/common/Time) › PerformanceDuration

```ts
type PerformanceDuration = number & Brand<"PerformanceDuration">;
```

Defined in: [packages/common/src/Time.ts:436](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Time.ts#L436)

Elapsed fractional milliseconds measured using [PerformanceTime](https://evolu.dev/docs/api-reference/common/Time/type-aliases/PerformanceTime).