[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:357](https://github.com/evoluhq/evolu/blob/a18269a1b822c670b507c6a9b73b23eed32551fe/packages/common/src/Time.ts#L357)

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