[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) › msLongTask

```ts
const msLongTask: number &
  Brand<"NonNaN"> &
  Brand<"Finite"> &
  Brand<"Int"> &
  Brand<"NonNegative"> &
  Brand<"LessThan281474976710655"> &
  Brand<"Millis">;
```

Defined in: [packages/common/src/Time.ts:600](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Time.ts#L600)

Long task threshold (50ms).

Tasks exceeding this are "long tasks" per web standards. Use with
[yieldNow](https://evolu.dev/docs/api-reference/common/Task/variables/yieldNow) to yield periodically and keep UI responsive.

## See

https://web.dev/articles/optimize-long-tasks