---
title: isPerformingLowLatencyPhases
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uiupdateinfo/isperforminglowlatencyphases
---

# isPerformingLowLatencyPhases

A Boolean value that indicates whether the UI update is in the low-latency phases.

## Declaration

```swift
var isPerformingLowLatencyPhases: Bool { get }
```

## Discussion

Discussion The value of this property is true between the beforeLowLatencyEventDispatch and afterLowLatencyCATransactionCommit UI update phases. Keep any code you run in this part of the UI update as minimal as possible, especially when isImmediatePresentationExpected is true. Defer any processing that isn’t critical for the current UI update until afterLowLatencyCATransactionCommit.

## See Also

### Working with low-latency updates

- [isImmediatePresentationExpected](uikit/uiupdateinfo/isimmediatepresentationexpected.md)
- [isLowLatencyEventDispatchConfirmed](uikit/uiupdateinfo/islowlatencyeventdispatchconfirmed.md)