[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) › PerformanceTimeOrigin

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

Defined in: [packages/common/src/Time.ts:362](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Time.ts#L362)

Unix epoch milliseconds used as the origin for [PerformanceTime](https://evolu.dev/docs/api-reference/common/Time/type-aliases/PerformanceTime).