[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:368](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Time.ts#L368)

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